[RFA] import drow dbxread.c fix to branch

[Michael Elizabeth Chastain]

I would like to import this bug fix to the 5.2 branch:

  http://sources.redhat.com/ml/gdb-cvs/2002-03/msg00149.html

  2002-03-21  Daniel Jacobowitz  <drow@mvista.com>
  * dbxread.c (process_one_symbol): Extend the first N_SLINE
  in a function to cover the entire beginning of the function
  as well if it does not already.

This ought to fix a major regression with gcc 2.95.3 -gstabs+, as reported
in PR gdb/379 and PR gdb/380.

I'm about to run a test of this in my Linux test bed.  Assuming that
it works and doesn't regress anything else, is it okay to import this
patch to the 5.2 branch?

Michael C