Don't use RTTI

modules/gui/qt4/dialogs_provider.cpp

@@ -57,7 +57,7 @@ void DialogsProvider::customEvent( QEvent *event )
 {
     if( event->type() == DialogEvent_Type )
     {
-        DialogEvent *de = dynamic_cast<DialogEvent*>(event);
+        DialogEvent *de = qobject_cast<DialogEvent*>(event);
         switch( de->i_dialog )
         {
             case INTF_DIALOG_FILE:

modules/gui/qt4/playlist_model.cpp

@@ -311,7 +311,7 @@ PLItem * PLModel::FindInner( PLItem *root, int i_id, bool b_input )
 /************************* Updates handling *****************************/
 void PLModel::customEvent( QEvent *event )
 {
-    PLEvent *ple = dynamic_cast<PLEvent *>(event);
+    PLEvent *ple = qobject_cast<PLEvent *>(event);
 
     if( event->type() == ItemUpdate_Type )
         ProcessInputItemUpdate( ple->i_id );