[gnome-control-center] common: Fix crash when filtering language list

[Bastien Nocera <hadess src gnome org>]

commit ee3f0720f2a22c9e829ba114713bfaf5b97cc8e2
Author: Bastien Nocera <hadess hadess net>
Date:   Tue Mar 27 13:44:44 2012 +0200

    common: Fix crash when filtering language list
    
    And it's still being populated. If the list gets filtered
    while it's being populated, we would end up with a row with NULL
    data, causing us to crash.
    
    Make sure to hold the GDK threads lock when reading from the list,
    to avoid racing with the insert code.
    
    http://bugzilla.gnome.org/show_bug.cgi?id=672293

 panels/common/cc-language-chooser.c |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/panels/common/cc-language-chooser.c b/panels/common/cc-language-chooser.c
index 6f8e9ff..b2f692d 100644
--- a/panels/common/cc-language-chooser.c
+++ b/panels/common/cc-language-chooser.c
@@ -46,10 +46,13 @@ cc_language_chooser_get_language (GtkWidget *chooser)
 
         tv = (GtkTreeView *) g_object_get_data (G_OBJECT (chooser), "list");
         selection = gtk_tree_view_get_selection (tv);
+
+        gdk_threads_enter ();
         if (gtk_tree_selection_get_selected (selection, &model, &iter))
                 gtk_tree_model_get (model, &iter, LOCALE_COL, &lang, -1);
         else
                 lang = NULL;
+        gdk_threads_leave ();
 
         return lang;
 }
@@ -245,7 +248,10 @@ filter_languages (GtkTreeModel *model,
 		return TRUE;
 	}
 
+	gdk_threads_enter ();
 	gtk_tree_model_get (model, iter, DISPLAY_LOCALE_COL, &locale, -1);
+	gdk_threads_leave ();
+
 	l = g_utf8_casefold (locale, -1);
 
 	visible = strstr (l, filter_string) != NULL;