cleanup, don't return stack, modify in place in _handleFunctionCall(), check that we have a stack value in handleFunction so we don't crash in symtable.py
cleanup, don't return stack, modify in place in _handleFunctionCall(), check that we have a stack value in handleFunction so we don't crash in symtable.py

thomasvs/pychecker,akaihola/PyChecker,akaihola/PyChecker,thomasvs/pychecker