don't ignore left-curly-braces when searching for the end of a...

don't ignore left-curly-braces when searching for the end of a variable/function reference; match them up with right-curly-braces so we choose the proper brace to end the reference (will still fail to parse properly if the reference contains unbalanced braces)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@21235 65c4cc65-6c06-0410-ace0-fbb531ad65f3