su_global_log.c: disable warning on SU_DEBUG[] (Doxygen-only variable)
su_global_log.c: disable warning on SU_DEBUG[] (Doxygen-only variable)

Patch from Michael Jerris.

darcs-hash:20080121171425-65a35-ed1da84e0e438f4e447963947d89e253a44bd596.gz

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