AP_Mission: correct compilation when RC_Channel not enabled

[peterbarker]

No description provided.

[peterbarker]

Board               AP_Periph  blimp  bootloader  copter  heli  iofirmware  plane  rover  sub
Durandal                       *      *           *       *                 *      *      *
HerePro             *                                                                     
Hitec-Airspeed      *                                                                     
KakuteH7-bdshot                *      *           *       *                 *      *      *
MatekF405                      *      *           *       *                 *      *      *
Pixhawk1-1M-bdshot             *                  *       *                 *      *      *
f103-QiotekPeriph   *                                                                     
f303-Universal      *                                                                     
iomcu                                                           *                         
revo-mini                      *      *           *       *                 *      *      *
skyviper-v2450                                    *                                       

[IamPete1]

Don't we also need a define here?

ardupilot/libraries/AP_Mission/AP_Mission.cpp

Line 409 in 4a48dc2

return start_command_do_aux_function(cmd);

[peterbarker]

Don't we also need a define here?

ardupilot/libraries/AP_Mission/AP_Mission.cpp

Line 409 in 4a48dc2

return start_command_do_aux_function(cmd);

Fixed