add_bolton splits a prototype's parameter and return lists into
char *p_params[200];
char *p_rets[200];
with no bounds check, so a prototypes file listing more than 200 of either
walked off the end of the arrays and the compiler died with
*** stack smashing detected *** : terminated
A prototypes file is input data. No input should be able to smash the
compiler's stack, whatever is wrong with it. Both loops now stop at the limit
and say so:
Prototype for <name> has more than 199 return values - ignoring the rest
