[gxml] GomDocument: fix find root element with canonical names

[Daniel Espinosa Ortiz <despinosa src gnome org>]

commit 47c88d348178782ae6e33110705b4285a798b6c5
Author: Daniel Espinosa <esodan gmail com>
Date:   Thu Mar 21 13:35:02 2019 -0600

    GomDocument: fix find root element with canonical names

 gxml/GomDocument.vala     | 6 +++++-
 test/GomDocumentTest.vala | 4 ++--
 2 files changed, 7 insertions(+), 3 deletions(-)
---
diff --git a/gxml/GomDocument.vala b/gxml/GomDocument.vala
index 9a75075..d688290 100644
--- a/gxml/GomDocument.vala
+++ b/gxml/GomDocument.vala
@@ -103,7 +103,11 @@ public class GXml.GomDocument : GomNode,
   private GomElement get_root_gom_element () {
     Object obj = null;
     foreach (ParamSpec spec in this.get_class ().list_properties ()) {
-      if ("::" in spec.get_nick () && spec.name.down () == "root") {
+      if ("::" in spec.get_nick ()) {
+        string name = spec.get_nick ().down ().replace ("::", "");
+        if (name != "root") {
+          continue;
+        }
         if (spec.value_type.is_a (typeof (GomElement))) {
           Value val = Value (Type.OBJECT);
           get_property (spec.name, ref val);
diff --git a/test/GomDocumentTest.vala b/test/GomDocumentTest.vala
index 5a86f03..f7edf33 100644
--- a/test/GomDocumentTest.vala
+++ b/test/GomDocumentTest.vala
@@ -25,7 +25,7 @@ using GXml;
 class GomDocumentTest : GXmlTest {
        class ObjectDocument : GomDocument {
                [Description (nick="::ROOT")]
-               public ObjectParent root { get; set; }
+               public ObjectParent root_element { get; set; }
                public class ObjectParent : GomElement {
                        construct {
                                try { initialize ("root"); }
@@ -756,7 +756,7 @@ class GomDocumentTest : GXmlTest {
                                var d = new ObjectDocument ();
                                d.read_from_string ("""<root><child id="id1"/><child id="id2"/></root>""");
                                message (d.write_string ());
-                               assert (d.root != null);
+                               assert (d.root_element != null);
                        } catch (GLib.Error e) {
                    GLib.message ("Error: "+e.message);
                    assert_not_reached ();