Programmable completions should not print job termination notifications

[Robin Green]

Hello,

I've been using programmable completions with bash-2.05b-24(redhat),
and I noticed it will print job termination notifications like:

[1]+  Done                    kpaint

when you press TAB in a context which invokes a programmable completion.

I don't think it should print this during a completion invocation,
as it's inconsistent with built-in completions, it's messy, and it gets
in the way. So, this looks like a bug.

Cheers,
-- 
Robin