Fixing trunk IMAP build

(closes issue #11788)
Reported by: DEA
Patches:
      vm-imap-build-fix.txt uploaded by DEA (license 3)



git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@99002 65c4cc65-6c06-0410-ace0-fbb531ad65f3