Problem with /fox3 and the colon (":") operator

[cpyrgas]

Everything I have tried with /fox3 and the dot operator is working great now, which is fantastic! I am only seeing some problems with the colon operator now, I hope this will be relatively easy to fix after all the other work has been done. For example the following throw a XSharp.Error at runtime:

Edit, after preparing the test it seems the problem happens only when a given identifier is first accessed with "." and then with ":"? If that's the case, the impact is low. In any case, I have adjusted tests C973 and C980 to cover also such cases

#pragma options("fox3", enable)
#pragma options("allowdot", enable)
#pragma options("memvar", enable)
#pragma options("undeclared", enable)
#pragma options("lb", enable)

CLASS TestClass123
	EXPORT TestFieldTyped := "abc" AS STRING
	CONSTRUCTOR()
		? TestFieldTyped.Length // OK
		? TestFieldTyped:Length // XSharp.Error
END CLASS

GLOBAL gcc := "abc" AS STRING
FUNCTION Start() AS VOID
	? gcc.Length // OK
	? gcc:Length // XSharp.Error
	
	TestClass123{}