Fixed typo in sip_subscribe_presence

Ignore-this: d059e221cfd7a68d6155f26db809e56

darcs-hash:20090518051801-1e3d8-ecdd67acaf3c1399802ab8eb412c9d703ae39f76
Append domain to SIP URI if script user uses a domain without a "."

darcs-hash:20090518073241-58103-37a34cfc156141a94055d754f72821d8f052df54