torture_sip.c: added test for sip_header_as_string() producing string longer than 128
torture_sip.c: added test for sip_header_as_string() producing string longer than 128

darcs-hash:20080423175640-65a35-dcfac665ec6b020ff6609bb3adb30bbce758bdcd.gz

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