[mythtv] bug if channel change fails

[Reza Naima]

if the external channel change command fails, it refuses to record the
show, however, it still populates the database with the show as if it
was recorded.  However, no file exists that corresponds with it. -r

2006-02-23 03:23:45.753 Reschedule requested for id 156.
2006-02-23 03:23:47.070 Scheduled 273 items in 1.3 = 0.65 match + 0.67
place
2006-02-23 03:23:47.109 TVRec(1): Changing from None to RecordingOnly
Turning on IRD
SEND: 0xFA 0x87 0xD
RECV: 2006-02-23 03:23:48.138 ret_pid(0) child(25954) status(0x0)
2006-02-23 03:23:49.140 ret_pid(0) child(25954) status(0x0)
2006-02-23 03:23:50.142 ret_pid(0) child(25954) status(0x0)
2006-02-23 03:23:51.148 ret_pid(0) child(25954) status(0x0)
2006-02-23 03:23:52.150 ret_pid(0) child(25954) status(0x0)
2006-02-23 03:23:53.151 ret_pid(0) child(25954) status(0x0)
2006-02-23 03:23:54.153 ret_pid(0) child(25954) status(0x0)
2006-02-23 03:23:55.155 ret_pid(0) child(25954) status(0x0)
Error (0x00)
2006-02-23 03:23:56.157 ret_pid(25954) child(25954) status(0xff00)
2006-02-23 03:23:56.158 ChannelBase: external tuning program exited with
error 255
2006-02-23 03:23:56.158 TVRec(1) Error: Failed to set channel to 7.
Reverting to kState_None
2006-02-23 03:23:56.158 TVRec(1): Changing from RecordingOnly to None
2006-02-23 03:23:56.164 Finished recording ABC World News Now: channel
1007
2006-02-23 03:23:56.167 Started recording: ABC World News Now: channel
1007 on cardid 1, sourceid 1
2006-02-23 03:23:57.169 Reschedule requested for id 0.
2006-02-23 03:23:57.811 Scheduled 273 items in 0.6 = 0.00 match + 0.64
place