nua.c: silenced warning when compiling with -DNDEBUG
nua.c: silenced warning when compiling with -DNDEBUG

darcs-hash:20061101153230-65a35-2a50b53d0ef790cf4ed772b87dbad820cc64deba.gz

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