Force width to be multiple of 16 on Mac OS X when we create a part desktop streaming device.
Fixes an issue reported by Emil Ivov and found to cause modifications to the Mac OS X Address Book to not be picked up by SIP Communicator upon subsequent searches.
Removing option "remember password" when editing sip account don't work (reported by Davide Corda on dev mailing list).
When creating new account (simple or advance form) make sure we don't reuse old AccountRegistration instances.
Do not flip vertically images from directshow webcam if there are already flipped.
Tries to detect is the incoming call audio or video one.