qt4 fullscreen: Uses FIND_ANYWHERE to find vout, fixes trax issue 24

modules/gui/qt4/components/interface_widgets.cpp

@@ -606,7 +606,7 @@ void ControlsWidget::setStatus( int status )
  */
 void ControlsWidget::fullscreen()
 {
-    vout_thread_t *p_vout = (vout_thread_t *)vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_CHILD );
+    vout_thread_t *p_vout = (vout_thread_t *)vlc_object_find( p_intf, VLC_OBJECT_VOUT, FIND_ANYWHERE );
     if( p_vout)
     {
         var_SetBool( p_vout, "fullscreen", !var_GetBool( p_vout, "fullscreen" ) );