[clutter/clutter-1.22] clutter-backend-gdk: Only set setting on successful gdk_screen_get_setting call

[Emmanuele Bassi <ebassi src gnome org>]

commit 8189d3b904757db668ac01f1081936c198831e57
Author: Matthieu Bouron <matthieu bouron collabora com>
Date:   Tue May 12 11:16:35 2015 +0200

    clutter-backend-gdk: Only set setting on successful gdk_screen_get_setting call
    
    It could happen that gdk_screen_get_setting fails to retreive
    Gdk/WindowScalingFactor which leads to the following warnings when
    clutter_init is called:
    
    GLib-GObject-WARNING **: value "0" of type 'gint' is invalid or out of range for property 
'window-scaling-factor' of type 'gint'
    GLib-GObject-WARNING **: value "0" of type 'gint' is invalid or out of range for property 
'dnd-drag-threshold' of type 'gint'
    
    https://bugzilla.gnome.org/show_bug.cgi?id=749256
    
    Slightly edited to fix up whitespace issues.
    
    Edited-by: Emmanuele Bassi <ebassi gnome org>

 clutter/gdk/clutter-backend-gdk.c |   14 ++++++++------
 1 files changed, 8 insertions(+), 6 deletions(-)
---
diff --git a/clutter/gdk/clutter-backend-gdk.c b/clutter/gdk/clutter-backend-gdk.c
index b4f7f1c..47bd671 100644
--- a/clutter/gdk/clutter-backend-gdk.c
+++ b/clutter/gdk/clutter-backend-gdk.c
@@ -94,12 +94,14 @@ clutter_backend_gdk_init_settings (ClutterBackendGdk *backend_gdk)
       GValue val = G_VALUE_INIT;
 
       g_value_init (&val, CLUTTER_SETTING_TYPE(i));
-      gdk_screen_get_setting (backend_gdk->screen,
-                             CLUTTER_SETTING_GDK_NAME(i),
-                             &val);
-      clutter_settings_set_property_internal (settings,
-                                              CLUTTER_SETTING_PROPERTY (i),
-                                              &val);
+      if (gdk_screen_get_setting (backend_gdk->screen,
+                                  CLUTTER_SETTING_GDK_NAME (i),
+                                  &val))
+        {
+          clutter_settings_set_property_internal (settings,
+                                                  CLUTTER_SETTING_PROPERTY (i),
+                                                  &val);
+        }
       g_value_unset (&val);
     }
 }