ua_invite2() crashed if there was problem creating SIP message.
ua_invite2() crashed if there was problem creating SIP message.

darcs-hash:20051010163800-65a35-dabead42f2b5a6130c39548b9f25fd31d9d259d7.gz

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