[gxml] Replace secure cast to avoid null results

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit a72870986bb816435bfa9ef8cc592eec188e96b1
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Oct 10 12:45:36 2019 -0500

    Replace secure cast to avoid null results

 examples/vala/example.vala | 2 +-
 gxml/Document.vala         | 4 ++--
 gxml/Element.vala          | 2 +-
 gxml/Object.vala           | 2 +-
 gxml/XDocument.vala        | 4 ++--
 gxml/XListChildren.vala    | 2 +-
 gxml/XNode.vala            | 2 +-
 gxml/XParser.vala          | 4 ++--
 test/ElementTest.vala      | 2 +-
 9 files changed, 12 insertions(+), 12 deletions(-)
---
diff --git a/examples/vala/example.vala b/examples/vala/example.vala
index 57a2232..cc62782 100755
--- a/examples/vala/example.vala
+++ b/examples/vala/example.vala
@@ -56,7 +56,7 @@ void create_a_document_from_a_path (string uri) throws GLib.Error {
        GLib.File f = GLib.File.new_for_uri (uri+"/bookshelf2.xml");
 
        doc = new GXml.Document.from_path (f.get_path ());
-       stdout.printf ("create_a_document_from_a_path:\n%s\n", (doc as GXml.Document).write_string ());
+       stdout.printf ("create_a_document_from_a_path:\n%s\n", ((GXml.Document) doc).write_string ());
 }
 
 void saving_a_document_to_a_path (string uri) throws GLib.Error {
diff --git a/gxml/Document.vala b/gxml/Document.vala
index fc6b055..8bf1186 100644
--- a/gxml/Document.vala
+++ b/gxml/Document.vala
@@ -249,11 +249,11 @@ public class GXml.Document : GXml.Node,
         }
       }
       if (node is DomText)
-        dst = this.create_text_node ((node as DomText).data);
+        dst = this.create_text_node (((DomText) node).data);
       if (node is DomComment)
         dst = ((DomDocument) this).create_comment (((DomComment) node).data);
       if (node is DomProcessingInstruction)
-        dst = this.create_processing_instruction (((DomProcessingInstruction) node).target, (node as 
DomProcessingInstruction).data);
+        dst = this.create_processing_instruction (((DomProcessingInstruction) node).target, 
(((DomProcessingInstruction) node).data));
       if (dst != null) {
         document_element.append_child (dst as DomNode);
         return dst;
diff --git a/gxml/Element.vala b/gxml/Element.vala
index ae74165..4ca3655 100644
--- a/gxml/Element.vala
+++ b/gxml/Element.vala
@@ -735,7 +735,7 @@ public class GXml.Element : GXml.Node,
       cs += class_names;
     foreach (GXml.DomNode n in child_nodes) {
       if (!(n is DomElement)) continue;
-      string cls = (n as DomElement).get_attribute ("class");
+      string cls = ((DomElement) n).get_attribute ("class");
       if (cls != null) {
         string[] ncls = {};
         if (" " in cls)
diff --git a/gxml/Object.vala b/gxml/Object.vala
index f130bf9..046f578 100644
--- a/gxml/Object.vala
+++ b/gxml/Object.vala
@@ -344,7 +344,7 @@ public interface GXml.Object : GLib.Object,
     if (prop != null) {
       if (prop.value_type.is_a (typeof (Object))) {
         Value v = Value (typeof (Object));
-        (this as Object).set_property (name, v);
+        ((Object) this).set_property (name, v);
         return true;
       }
       if (prop.value_type.is_a (typeof (string))) {
diff --git a/gxml/XDocument.vala b/gxml/XDocument.vala
index 6c61baf..a7d193a 100644
--- a/gxml/XDocument.vala
+++ b/gxml/XDocument.vala
@@ -262,11 +262,11 @@ public class GXml.XDocument : GXml.XNode,
         }
       }
       if (node is DomText)
-        dst = this.create_text_node ((node as DomText).data);
+        dst = this.create_text_node (((DomText) node).data);
       if (node is DomComment)
         dst = ((DomDocument) this).create_comment (((DomComment) node).data);
       if (node is DomProcessingInstruction)
-        dst = this.create_processing_instruction (((DomProcessingInstruction) node).target, (node as 
DomProcessingInstruction).data);
+        dst = this.create_processing_instruction (((DomProcessingInstruction) node).target, 
((DomProcessingInstruction) node).data);
       if (dst != null) {
         document_element.append_child (dst as DomNode);
         return dst;
diff --git a/gxml/XListChildren.vala b/gxml/XListChildren.vala
index 01c248a..849664f 100644
--- a/gxml/XListChildren.vala
+++ b/gxml/XListChildren.vala
@@ -81,7 +81,7 @@ public class GXml.XListChildren : AbstractBidirList<GXml.DomNode>,
     if (index > size || index < 0) return nullnode;
     var n = @get (index);
     if (n == null) return nullnode;
-    var np = (n as GXml.XNode).get_internal_node ();
+    var np = ((GXml.XNode) n).get_internal_node ();
     np->unlink ();
     delete np;
     return nullnode;
diff --git a/gxml/XNode.vala b/gxml/XNode.vala
index 3b8546f..4f1cae1 100644
--- a/gxml/XNode.vala
+++ b/gxml/XNode.vala
@@ -247,7 +247,7 @@ public abstract class GXml.XNode : GLib.Object,
     if (this.children_nodes.size != node.child_nodes.size) return false;
     foreach (GXml.DomNode a in attrs.values) {
       if (!((GXml.XNode?) node).attrs.has_key (a.node_name)) return false;
-      if ((a as XNode).value != ((XNode) ((GXml.XNode) node).attrs.get (a.node_name)).value) return false;
+      if (((XNode) a).value != ((XNode) ((GXml.XNode) node).attrs.get (a.node_name)).value) return false;
     }
     for (int i=0; i < children_nodes.size; i++) {
       if (!((GXml.DomNode) children_nodes[i]).is_equal_node (((GXml.DomNode?) node).child_nodes[i])) return 
false;
diff --git a/gxml/XParser.vala b/gxml/XParser.vala
index 09d480b..a52ceaf 100644
--- a/gxml/XParser.vala
+++ b/gxml/XParser.vala
@@ -500,7 +500,7 @@ public class GXml.XParser : GLib.Object, GXml.Parser {
         tw.start_element (element_node.local_name);
 
     // GXml.Object serialization
-    var lp = (node as GXml.Object).get_properties_list ();
+    var lp = ((GXml.Object) node).get_properties_list ();
     foreach (ParamSpec pspec in lp) {
       string attname = pspec.get_nick ().replace ("::","");
       string val = null;
@@ -511,7 +511,7 @@ public class GXml.XParser : GLib.Object, GXml.Parser {
         if (gp == null) continue;
         val = gp.value;
       } else {
-        val = (node as GXml.Object).get_property_string (pspec);
+        val = ((GXml.Object) node).get_property_string (pspec);
       }
       if (val == null) continue;
       size += tw.write_attribute (attname, val);
diff --git a/test/ElementTest.vala b/test/ElementTest.vala
index 81feba8..de2699a 100644
--- a/test/ElementTest.vala
+++ b/test/ElementTest.vala
@@ -267,7 +267,7 @@ class GXml.ElementTest : GXmlTest  {
                                        GLib.message ("Attribute: "+k+"="+v);
                                }
 #endif
-                               message ((node as GXml.Element).write_string ());
+                               message (((GXml.Element) node).write_string ());
                                assert (((DomElement) node).attributes.length == 2);
                                assert (((DomElement) node).get_attribute ("xmlns:magic") == 
"http://hogwarts.co.uk/magic";);
                                assert (((DomElement) node).get_attribute_ns 
("http://www.w3.org/2000/xmlns/";, "magic") == "http://hogwarts.co.uk/magic";);