TextField fix for mac target
TextField fix for mac target

Previous code results in syntax error on mac target for obvious reasons. This should fix it.
openfl/openfl,Gama11/openfl,NenadBojkovski/openfl,openfl/openfl,Gama11/openfl,Gama11/openfl,openfl/openfl,Gama11/openfl,NenadBojkovski/openfl