These small fixes prevent compiler warnings with ubuntu 8.10's gcc-4.3.2,...

These small fixes prevent compiler warnings with ubuntu 8.10's gcc-4.3.2, which tend to break my dev-mode build. Not a problem in 1.6.x.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@178870 65c4cc65-6c06-0410-ace0-fbb531ad65f3