Missing quote in ODBC query.

(closes issue #16953)
 Reported by: elguero
 Patches: 
       app_voicemail-odbc-syntax-fix.diff uploaded by elguero (license 37)


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@250913 65c4cc65-6c06-0410-ace0-fbb531ad65f3