Compiler warning: -Wno-pointer-integer-compare

[PalumboN]

These warnings are due comparison between pointers (most char *) and integers (most sqInt). For example:

generated/64/vm/src/gcc3x-cointerp.c:29031:31: 
warning: comparison between pointer and integer ('char *' and 'usqInt' (aka 'unsigned long')) [-Wpointer-integer-compare]
                if (GIV(instructionPointer) == (ceReturnToInterpreterPC())) {

It is because all the pointers to the stack are declared as char *... check the comment on this line:

pharo-vm/smalltalksrc/VMMaker/StackInterpreter.class.st

Lines 537 to 540 in 5aa6b45

	"These are all pointers; char * because Slang has no support for C pointer arithmetic."
	self declareC: #(instructionPointer stackPointer framePointer stackLimit breakSelector)
	as: #'char *'
	in: aCCodeGenerator.

The problem changing that line to #usqInt makes compilation errors.