[glib] Remove redundant checks before free

[Marek Kašík <mkasik src gnome org>]

commit c7c4c3bf5e3fdb5f95f92e881743ef8e7ad779f1
Author: Marek Kasik <mkasik redhat com>
Date:   Mon Jul 14 15:37:06 2014 +0200

    Remove redundant checks before free
    
    Remove checks for NULL before g_free().
    
    https://bugzilla.gnome.org/show_bug.cgi?id=733156

 gio/fen/fen-kernel.c     |    4 +---
 gio/gdbusintrospection.c |    3 +--
 gio/gnetworkaddress.c    |    3 +--
 gio/gnetworkservice.c    |    3 +--
 4 files changed, 4 insertions(+), 9 deletions(-)
---
diff --git a/gio/fen/fen-kernel.c b/gio/fen/fen-kernel.c
index a724f2f..8277fab 100644
--- a/gio/fen/fen-kernel.c
+++ b/gio/fen/fen-kernel.c
@@ -460,9 +460,7 @@ printevent (const char *pname, int event, const char *tag)
     static gchar       *event_string = NULL;
     GString                    *str;
 
-    if (event_string) {
-        g_free(event_string);
-    }
+    g_free(event_string);
 
     str = g_string_new ("");
     g_string_printf (str, "[%s] [%-20s]", tag, pname);
diff --git a/gio/gdbusintrospection.c b/gio/gdbusintrospection.c
index 0c501c4..6d3ff93 100644
--- a/gio/gdbusintrospection.c
+++ b/gio/gdbusintrospection.c
@@ -1827,8 +1827,7 @@ g_dbus_node_info_new_for_xml (const gchar  *xml_data,
   g_free (ughret);
 
  out:
-  if (parser != NULL)
-    g_free (parser);
+  g_free (parser);
   if (context != NULL)
     g_markup_parse_context_free (context);
 
diff --git a/gio/gnetworkaddress.c b/gio/gnetworkaddress.c
index 0519713..5cb4c74 100644
--- a/gio/gnetworkaddress.c
+++ b/gio/gnetworkaddress.c
@@ -181,8 +181,7 @@ g_network_address_set_property (GObject      *object,
       break;
 
     case PROP_SCHEME:
-      if (addr->priv->scheme)
-        g_free (addr->priv->scheme);
+      g_free (addr->priv->scheme);
       addr->priv->scheme = g_value_dup_string (value);
       break;
 
diff --git a/gio/gnetworkservice.c b/gio/gnetworkservice.c
index fb37620..497d6fd 100644
--- a/gio/gnetworkservice.c
+++ b/gio/gnetworkservice.c
@@ -350,8 +350,7 @@ g_network_service_set_scheme (GNetworkService *srv,
 {
   g_return_if_fail (G_IS_NETWORK_SERVICE (srv));
 
-  if (srv->priv->scheme)
-    g_free (srv->priv->scheme);
+  g_free (srv->priv->scheme);
   srv->priv->scheme = g_strdup (scheme);
 
   g_object_notify (G_OBJECT (srv), "scheme");