Add custsomCheckInfo dynamic.

hxd/res/Image.hx

@@ -287,9 +287,14 @@ class Image extends Resource {
 			}
 		}
 
+		customCheckInfo(this);
+
 		return inf;
 	}
 
+	public static dynamic function customCheckInfo(i : Image) {
+	}
+
 	public function getPixels( ?fmt : PixelFormat, ?index : Int ) {
 		var pixels : hxd.Pixels;
 		if( index == null )