[common] fix Color zero

src/common/haxe/ru/m/draw/Color.hx

@@ -28,7 +28,7 @@ abstract Color(Int) {
     }
 
     private inline function get_zero():Bool {
-        return this == 0;
+        return green == 0 && red == 0 && blue == 0;
     }
 
     @:from