From gnulib:
authorJim Meyering <jim@meyering.net>
Wed, 22 Jun 2005 11:55:38 +0000 (11:55 +0000)
committerJim Meyering <jim@meyering.net>
Wed, 22 Jun 2005 11:55:38 +0000 (11:55 +0000)
commitfd78e6606721b0e80e933d9d14f01189dc195748
tree55f5e4fe52096627a2ce1529a05590127121ab41
parentfb33aea31fe3eeb6a35b160c9ab86cd35c090d3c
From gnulib:

  (HAVE_GNU_CALLOC): New constant.
  (xcalloc): Use it to avoid needless tests.
lib/xmalloc.c