xbmc/xbmc — pull request #1859 by nemphys (2012-11-29 23:25:14+00:00)
Title: fix excess disk activity caused by repeated and without reason epg updates

partially revert 730b9477, so that EPG data is *not* updated every five minutes for channels with no EPG data.

causes too much disk activity without a significant reason (as explained here:
https://github.com/xbmc/xbmc/commit/730b9477fac17352d80e8e49b641c7f858366a78#commitcomment-2229415)