[glade] Set ignore=true on virtual property glade-style-classes to avoid bogus warnings

[Juan Pablo Ugarte <jpu src gnome org>]

commit 39cab4bce99c7747bf3e1c03b51475e51bbf4397
Author: Juan Pablo Ugarte <juanpablougarte gmail com>
Date:   Thu Sep 13 21:41:13 2012 -0300

    Set ignore=true on virtual property glade-style-classes to avoid bogus warnings

 plugins/gtk+/gtk+.xml.in |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/gtk+/gtk+.xml.in b/plugins/gtk+/gtk+.xml.in
index ebd9e00..37e8128 100644
--- a/plugins/gtk+/gtk+.xml.in
+++ b/plugins/gtk+/gtk+.xml.in
@@ -67,7 +67,7 @@
 	<property id="margin-top" common="True" since="3.0"/>
 	<property id="margin-bottom" common="True" since="3.0"/>
 
-	<property id="glade-style-classes" _name="Style Classes" weight="4.25" common="True" save="False" since="3.0">
+	<property id="glade-style-classes" _name="Style Classes" weight="4.25" common="True" save="False" ignore="True" since="3.0">
 	  <parameter-spec>
 	    <type>GParamBoxed</type>
 	    <value-type>GladeStringList</value-type>