Style sheet parser: Adjust number of reserved properties, and formatting

Source/Core/StyleSheetParser.cpp

@@ -91,7 +91,7 @@ private:
 	ShorthandId id_rectangle;
 
 public:
-	SpritesheetPropertyParser() : specification(4, 1)
+	SpritesheetPropertyParser() : specification(6, 1)
 	{
 		id_src = specification.RegisterProperty("src", "", false, false).AddParser("string").GetId();
 		id_rx = specification.RegisterProperty("rectangle-x", "", false, false).AddParser("length").GetId();