Added empty line at end of sip_register for consistency

Ignore-this: 5619f338e3ac161332d0296e8507990e

darcs-hash:20090327135249-1e3d8-273bc344586b5ecbb052936be3e519500c4d5739
Changed sip_register to not activate engine logging unless required

Ignore-this: e41bcc59092c7e44b6b817db3e666e28

darcs-hash:20090327142714-1e3d8-c2149956e60e2d51128768a8bfc43e7b7a38f78f