[mythtvnz] No EPG data for some channels (now OK)

[Robert Fisher]

I use Stephen's mhegpgsnoop to get my EPG data.

Recently I noticed that several channels (mainly the +1 channels I 
think) had no data.

I thought that I might have to rescan or something but after a couple of 
weeks, without me doing anything, I have data on all of my channels again.

Maybe the data was not included with the signal for that period? Did 
anyone else notice this?

Rob