- implemented pass-by-reference arguments - so far only for memory based variables.

- changed Dehacked weapon function lookup to check the symbol table instead of directly referencing the VM functions. Once scriptified these pointers will no longer be available.
- removed all special ATAGs from the VM. While well intentioned any pointer tagged with them is basically unusable because it'd trigger asserts all over the place.
- scriptified A_Punch for testing pass-by-reference parameters and stack variables.

src/scripting/zscript/zcc_compile.cpp

@@ -2160,6 +2160,7 @@ void ZCCCompiler::InitFunctions()
 								if ((flags & VARF_Out) || (type != TypeVector2 && type != TypeVector3))
 								{
 									type = NewPointer(type);
+									flags |= VARF_Ref;
 								}
 								else if (type == TypeVector2)
 								{