[gnome-shell] shell-global: Fix regression from 071a4e5f83db6a0e0ab01a3

[Adel Gadllah <agadllah src gnome org>]

commit 95ec8ef5e16d9f5df800802d444d0c2eebe9c89b
Author: Adel Gadllah <adel gadllah gmail com>
Date:   Sat Mar 2 18:13:26 2013 +0100

    shell-global: Fix regression from 071a4e5f83db6a0e0ab01a3
    
    The clutter_threads_add_repaint_func_full need to return TRUE otherwise
    they will be only called once.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=695006

 src/shell-global.c |   12 ++++++++----
 1 files changed, 8 insertions(+), 4 deletions(-)
---
diff --git a/src/shell-global.c b/src/shell-global.c
index 7e091db..889e146 100644
--- a/src/shell-global.c
+++ b/src/shell-global.c
@@ -802,18 +802,22 @@ global_stage_notify_height (GObject    *gobject,
   g_object_notify (G_OBJECT (global), "screen-height");
 }
 
-static void
+static gboolean
 global_stage_before_paint (gpointer data)
 {
   shell_perf_log_event (shell_perf_log_get_default (),
                         "clutter.stagePaintStart");
+
+  return TRUE;
 }
 
-static void
+static gboolean
 global_stage_after_paint (gpointer data)
 {
   shell_perf_log_event (shell_perf_log_get_default (),
                         "clutter.stagePaintDone");
+
+  return TRUE;
 }
 
 /* This is an IBus workaround. The flow of events with IBus is that every time
@@ -938,11 +942,11 @@ _shell_global_set_plugin (ShellGlobal *global,
                     G_CALLBACK (global_stage_notify_height), global);
 
   clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_PRE_PAINT,
-                                         (GSourceFunc) global_stage_before_paint,
+                                         global_stage_before_paint,
                                          NULL, NULL);
 
   clutter_threads_add_repaint_func_full (CLUTTER_REPAINT_FLAGS_POST_PAINT,
-                                         (GSourceFunc) global_stage_after_paint,
+                                         global_stage_after_paint,
                                          NULL, NULL);
 
   shell_perf_log_define_event (shell_perf_log_get_default(),