engine: fix cuestack test unit after fadechannel change
engine: fix cuestack test unit after fadechannel change

kripton/qlcplus,sbenejam/qlcplus,kripton/qlcplus,sbenejam/qlcplus,sbenejam/qlcplus,mcallegari/qlcplus,kripton/qlcplus,plugz/qlcplus,plugz/qlcplus,plugz/qlcplus,kripton/qlcplus,mcallegari/qlcplus,mcallegari/qlcplus,plugz/qlcplus,mcallegari/qlcplus,plugz/qlcplus,sbenejam/qlcplus,sbenejam/qlcplus,sbenejam/qlcplus,sbenejam/qlcplus,mcallegari/qlcplus,plugz/qlcplus,kripton/qlcplus,plugz/qlcplus,mcallegari/qlcplus,mcallegari/qlcplus,kripton/qlcplus,kripton/qlcplus