Fixed debugging output in nua_stack.c.
Fixed debugging output in nua_stack.c.

darcs-hash:20050915065526-65a35-4fb50600100e035d2ab753fb50d4ee36a30c93c3.gz

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