The ZAP OSD disappears after the zap and not after the zap timeout.

To reproduce:
- configure ZAP OSD delay 1 second
- configure ZAP OSD timeout 5 seconds
- start My TV
- goto fullscreen
- ZAP with F7/F8
- the channel is changed after the second timeout and the ZAP OSD disappears
-> the OSD should stay 4 additional seconds

Reported on the forums:
http://nolanparty.com/mediaportal.sourceforge.net/phpBB2/viewtopic.php?t=6901