attempt fix for race condition
attempt fix for race condition

git-svn-id: bcd6b86955ef202e70aa6c54fa81c3470d610618@16064 d0543943-73ff-0310-b7d9-9358b9ac24b2

xhook/sofia-sip,BelledonneCommunications/sofia-sip,unispeech/sofia-sip,jart/sofia-sip,xhook/sofia-sip,erdincay/sofia-sip,unispeech/sofia-sip,jart/sofia-sip,BelledonneCommunications/sofia-sip,jart/sofia-sip,BelledonneCommunications/sofia-sip,unispeech/sofia-sip,xhook/sofia-sip,unispeech/sofia-sip,erdincay/sofia-sip,erdincay/sofia-sip,erdincay/sofia-sip,xhook/sofia-sip,xhook/sofia-sip,BelledonneCommunications/sofia-sip