Fixed problem in ICMP handling.
Fixed problem in ICMP handling.

darcs-hash:20060410222308-88462-9273d10a5db9e44e4452f231ff3f3a27db27970e.gz

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