[clutter] Fix calculation of duration for ClutterState default transitions

[Emmanuele Bassi <ebassi src gnome org>]

commit fcc2ab7be594427c0dd2b0570a67ae9c555f1f40
Author: Craig R. Hughes <craig git rungie com>
Date:   Mon Sep 19 09:30:00 2011 -0700

    Fix calculation of duration for ClutterState default transitions
    
    https://bugzilla.gnome.org/show_bug.cgi?id=659200

 clutter/clutter-state.c |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/clutter/clutter-state.c b/clutter/clutter-state.c
index 236ca90..adb80a4 100644
--- a/clutter/clutter-state.c
+++ b/clutter/clutter-state.c
@@ -1969,8 +1969,13 @@ clutter_state_get_duration (ClutterState *state,
   if (target_state != NULL)
     {
       if (source_state_name)
-        ret = GPOINTER_TO_INT (g_hash_table_lookup (target_state->durations,
-                                                    source_state_name));
+        {
+          ret = GPOINTER_TO_INT (g_hash_table_lookup (target_state->durations,
+                                                      source_state_name));
+          if(!ret)
+            ret = GPOINTER_TO_INT (g_hash_table_lookup (target_state->durations,
+                                                        NULL));
+        }
       else
         ret = GPOINTER_TO_INT (g_hash_table_lookup (target_state->durations,
                                                     NULL));