[PATCH][gdb] Fix python selftest with python 3.11

[Mark Wielaard]

Hi Tom,

On Thu, Jul 21, 2022 at 01:13:17PM +0200, Tom de Vries wrote:
> Fix this by also allowing line number 0.
> 
> Tested on x86_64-linux.
> 
> This should hopefully fix buildbot builder gdb-rawhide-x86_64.
> 
> Any comments?

It seems the line number is really irrelevant here for where exactly
the KeyboardInterrupt took place. So the patch looks good to me.

Note that there is a gdb-try-rawhide-x86_64 builder, so you can also
test by pushing this to a git users/vries/try-xxx branch.

Cheers,

Mark