Fixed sip_dig errors when building on VC6/win32.
Fixed sip_dig errors when building on VC6/win32.

darcs-hash:20060508104731-77cd4-3889f8890713f48a527b9853e2bf95b477b8beb2.gz

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