The ACC compiler used to be able to compile itself. This was a neat
feature, but because ACC only supports ints, pointers are stored as
ints, and cast to pointers when used.
This checkin turns many ints that are really pointers back into
pointers, so that the code is clearer.
int ch;
char* glo;
char* sym_stack;
char* dstk;
char* dptr;
int dch;
char* last_id;
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