[RFA] Move alloca(0) to wait_for_inferior() from registers_changed()

[Nick Duffek]

On 13-Nov-2000, I wrote:

>The appended patch moves an alloca (0) call from registers_changed() in
>regcache.c to wait_for_inferior() in infrun.c.

Whoops, I should have sent that to gdb-patches.  It's there now.

Nick