DIRECTOR: Call updateCast for not-dirty sprites

This restores text interactivity in Warlock.

engines/director/score.cpp

@@ -417,6 +417,7 @@ void Score::renderSprites(uint16 frameId, RenderMode mode) {
 			_stage->addDirtyRect(channel->getBbox());
 		} else if (!channel->_sprite->_puppet) {
 			// Updating scripts, etc. does not require a full re-render
+			channel->_sprite->updateCast();
 			channel->_sprite->_scriptId = nextSprite->_scriptId;
 		}
 	}