nua/test_call_hold.c: removed warning
nua/test_call_hold.c: removed warning

darcs-hash:20061121081931-65a35-dd46f85eac627bd0011c10d60e74ce16ee067ed8.gz

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