[RFA] Handle stack underflow in dbxread.c

[Klee Dienes]

2002-11-15  Klee Dienes  <kdienes@apple.com>

         * buildsym.h (pop_context): Check for stack underflow.
         * dbxread.c (process_one_symbol): Complain and stop processing
         that symbol if we are already at the top of the context stack 
for
         a function-end N_FUN (this would imply an umatched RBRAC).  
Ditto
         when processing N_RBRAC.

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