xbmc/xbmc — pull request #3105 by ulion (2013-08-15 08:10:28+00:00)
Title: [OSX] Kickout screensaver if it's running. Fix #14271

IOPMAssertionCreateWithName did work for prevent screensaver from kick in, but if the screensaver is already running, like in http://trac.xbmc.org/ticket/14271 it won't help, so we had to add an UpdateSystemActivity call to overcome it.