When a module name instruction is encountered the name space is modified. However the old name space should be reset when an end module statement is reached. As the modules can be nested into each other the name spaces are stored in a name space stack during syntax analysis.
This function pops the name space from the name space stack and copies the value to the pEx->CurrentNameSpace variable. This should be executed when a name space is closed and we want to return to the embedding name space.
int expression_PopNameSpace(peXobject pEx
){