Fix #956

Author: David Gillen

src/easeljs/display/DisplayObject.js

@@ -895,7 +895,7 @@ this.createjs = this.createjs||{};
 	 * @return {String} The image data url for the cache.
 	 **/
 	p.getCacheDataURL = function() {
-		return this.bitmapCache?this.bitmapCache.getDataURL():null;
+		return this.bitmapCache?this.bitmapCache.getCacheDataURL():null;
 	};
 
 	/**