DIRECTOR: Do not call renderSprites() in b_updateStage

This function updates the sprites from the score. We do not want to do
that, as it wipes any non-puppet changes made by Lingo. Notably, this
broke the cursor in Chop Suey.

engines/director/lingo/lingo-builtins.cpp

@@ -2291,7 +2291,6 @@ void LB::b_updateStage(int nargs) {
 
 	Score *score = movie->getScore();
 
-	score->renderSprites(score->getCurrentFrame());
 	if (movie->_videoPlayback)
 		score->renderVideo();