[ChannelSelection]: Solve GSOD when moving in radiochannellist

THX to PLi Team Fot this FiX
http://sourceforge.net/p/openpli/enigma2/ci/d5a5c934f746ae42cc2ff1e157c49b3c3a33ec7b/
If you disable "Hide channel list in radio mode" (User interface settings) and try to move a channel in the channel list, you get a green screen (when you activate the move mode).
http://forums.openpli.org/topic/35467-bug-in-radiomode-when-move-channels/
Thanks betacentauri for reporting.