RFA: use xcalloc for zalloc.

[Joel Brobecker]

Joern,

> 2007-04-30  J"orn Rennecke  <joern.rennecke@arc.com>
> 
> 	Speed up simulator startup:
> 	* sim-utils.c (zalloc): Use xcalloc.

You patch is approved by Franck Ch. Eigler (he sent the approval in
a private email to me)

There is one issue, though: It appears that you do not have a copyright
assignment in file for GDB? I think I located you, but it only says
that you have assigned changes to GCC.

This is a very small and fairly simple change, so I'll check it in
as a "not legally significant change" (aka "tiny change"). But if
you think you might contribute more patches to GDB, you might want to
consider filing copyright assignment papers for GDB as well.

-- 
Joel