Fix 'catch catch' crash

[Tom Tromey]

>>>>> "Pedro" == Pedro Alves <pedro@codesourcery.com> writes:

Pedro>  (gdb) catch catch
Pedro>  Function "__cxa_begin_catch" not defined.

Pedro> The nagging about not finding the "__cxa_begin_catch" function
Pedro> could be hidden from the user;

Yeah... would you mind filing a bug report for this?
(And for the other too, if you want; this one seemed more important to
me somehow.)

thanks,
Tom