HTMLParser: workaround for Haxe 4 compatibility
HTMLParser: workaround for Haxe 4 compatibility

This applies the workaround mentioned in HaxeFoundation/haxe#6656 to restore Haxe 4 compatibility.
openfl/openfl,Gama11/openfl,openfl/openfl,openfl/openfl,Gama11/openfl,Gama11/openfl,Gama11/openfl