Fix a few compile warnings (turned errors) and disable -Werror on the

normal build.  If people want this they can turn it on, and don't anyone 
turn it on by default until you fix building on GCC 4.x


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@10842 65c4cc65-6c06-0410-ace0-fbb531ad65f3