libvlc: Don't raise an exception if there is no vout in set_drawable.

src/control/media_player.c

@@ -724,9 +724,7 @@ void libvlc_media_player_set_drawable( libvlc_media_player_t *p_mi,
     }
 
     p_vout = vlc_object_find( p_input_thread, VLC_OBJECT_VOUT, FIND_CHILD );
-    if( !p_vout )
-        libvlc_exception_raise( p_e, "No active video output" );
-    else
+    if( p_vout )
     {
         vout_Control( p_vout , VOUT_REPARENT, drawable);
         vlc_object_release( p_vout );