Re-enable the embed video module in qt4.

modules/gui/qt4/qt4.cpp

@@ -223,11 +223,11 @@ vlc_module_begin ()
         set_capability( "dialogs provider", 51 )
 
         set_callbacks( OpenDialogs, Close )
-#if 0 /* this is totally broken */
+
     add_submodule ()
         set_capability( "vout_window", 50 )
         set_callbacks( WindowOpen, WindowClose )
-#endif
+
 vlc_module_end ()
 
 /* Ugly, but the Qt4 interface assumes single instance anyway */