sres_sip.c: be more robust if the DNS fails badly
sres_sip.c: be more robust if the DNS fails badly

Ignore-this: 1922836529de164a842ab88e848066a0

darcs-hash:20090225191024-db55f-69d3463af8fc267ba8e95f43c6ed4fd8394e9bfd.gz

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