On systems with a LOT of RAM, a signed integer sometimes printed negative.

(closes issue #16837)
 Reported by: jlpedrosa
 Patches: 
       20100504__issue16837.diff.txt uploaded by tilghman (license 14)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@265316 65c4cc65-6c06-0410-ace0-fbb531ad65f3