[clutter] gesture-action: Make _cancel() callable after the gesture has started

[Emanuele Aina <emaaa src gnome org>]

commit 1eaa57788347e4271e96b7a1972f323fe859e02b
Author: Emanuele Aina <emanuele aina collabora com>
Date:   Fri Oct 5 12:21:10 2012 +0200

    gesture-action: Make _cancel() callable after the gesture has started
    
    https://bugzilla.gnome.org/show_bug.cgi?id=685554

 clutter/clutter-gesture-action.c |    6 +++++-
 1 files changed, 5 insertions(+), 1 deletions(-)
---
diff --git a/clutter/clutter-gesture-action.c b/clutter/clutter-gesture-action.c
index d18e19f..4c9460b 100644
--- a/clutter/clutter-gesture-action.c
+++ b/clutter/clutter-gesture-action.c
@@ -292,6 +292,11 @@ stage_captured_event_cb (ClutterActor       *stage,
                   return CLUTTER_EVENT_PROPAGATE;
                 }
 
+              /* clutter_gesture_action_cancel() may have been called during
+               * gesture_prepare(), check that the gesture is still active. */
+              if (!priv->in_gesture)
+                return CLUTTER_EVENT_PROPAGATE;
+
               g_signal_emit (action, gesture_signals[GESTURE_BEGIN], 0, actor,
                              &return_value);
               if (!return_value)
@@ -916,7 +921,6 @@ void
 clutter_gesture_action_cancel (ClutterGestureAction *action)
 {
   g_return_if_fail (CLUTTER_IS_GESTURE_ACTION (action));
-  g_return_if_fail (!action->priv->in_gesture);
 
   cancel_gesture (action);