This little mod gets rid of that g722 compiler warning that breaks builds...

This little mod gets rid of that g722 compiler warning that breaks builds configured with --enable-dev-mode; the previous commit of 48767 was to merge in changes for bug 6334, unifying the open mode arguments for saner operation.

git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@48781 65c4cc65-6c06-0410-ace0-fbb531ad65f3