[PATCH] Fix nullptr in with_command_1

[Tom Tromey]

>>>>> "Bogdan" == Bogdan Harjoc <harjoc@gmail.com> writes:

Bogdan> Reproduced with gdb built from git HEAD, running 'with' without
Bogdan> arguments. Patch is attached.

This needs a ChangeLog entry.
I think a simple test case would also be good.

thanks,
Tom