decode: fix assign of channel_name

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
serve: fix assign of channel_name

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>
dvbtee v0.2.2

Signed-off-by: Michael Krufky <mkrufky@linuxtv.org>