frame.c backtrace limit issue and fix

[Jonathan Larmour]

Daniel Jacobowitz wrote:
> You seem to be submitting patches against an old version; there already
> is a function named add_setshow_integer_cmd.  Andrew added it in
> February.

Oops, yes it was against the most recent official release (6.3) not CVS. I 
had to do the patch against 6.3 for my work, and didn't remember to switch 
to CVS for the submission, my mistake.

[ker-snip]
> With all those fixed, I get the attached patch, which I've tested,
> regression tested, and checked in.  Thanks.

Looks like you spent more effort on it than I did, so thank *you*!

Jifl
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