Fixed Linux compile error
Fixed Linux compile error

labtoast/apm_planner,TheIronBorn/qgroundcontrol,xros/apm_planner,xros/apm_planner,abcdelf/apm_planner,nado1688/qgroundcontrol,sverling/qgc_asl,caoxiongkun/qgroundcontrol,catch-twenty-two/qgroundcontrol,mihadyuk/qgroundcontrol,abcdelf/apm_planner,Icenowy/apm_planner,381426068/apm_planner,381426068/apm_planner,caoxiongkun/qgroundcontrol,TheIronBorn/qgroundcontrol,CornerOfSkyline/qgroundcontrol,hejunbok/qgroundcontrol,labtoast/apm_planner,TheIronBorn/qgroundcontrol,duststorm/apm_planner,iidioter/qgroundcontrol,mirkix/apm_planner,UAVenture/qgroundcontrol,duststorm/apm_planner,gpaes/apm_planner,xros/apm_planner,UAVenture/qgroundcontrol,WorkerBees/apm_planner,iidioter/qgroundcontrol,LIKAIMO/qgroundcontrol,RedoXyde/PX4_qGCS,scott-eddy/qgroundcontrol,ethz-asl/qgc_asl,chen0510566/apm_planner,greenoaktree/qgroundcontrol,dcarpy/apm_planner,devbharat/qgroundcontrol,sutherlandm/apm_planner,BMP-TECH/qgroundcontrol,diydrones/apm_planner,LittleBun/apm_planner,LIKAIMO/apm_planner,josephlewis42/UDenverQGC2,remspoor/qgroundcontrol,iidioter/qgroundcontrol,duststorm/apm_planner,chen0510566/apm_planner,381426068/apm_planner,caoxiongkun/qgroundcontrol,xros/apm_planner,remspoor/qgroundcontrol,nado1688/qgroundcontrol,gpaes/apm_planner,fizzaly/qgroundcontrol,cfelipesouza/qgroundcontrol,LittleBun/apm_planner,TheIronBorn/qgroundcontrol,nado1688/qgroundcontrol,Icenowy/apm_planner,mirkix/apm_planner,fizzaly/qgroundcontrol,devbharat/qgroundcontrol,WorkerBees/apm_planner,josephlewis42/UDenverQGC2,remspoor/qgroundcontrol,hejunbok/apm_planner,kd0aij/qgroundcontrol,abcdelf/apm_planner,labtoast/apm_planner,lis-epfl/qgroundcontrol,iidioter/qgroundcontrol,RedoXyde/PX4_qGCS,mihadyuk/qgroundcontrol,LIKAIMO/qgroundcontrol,devbharat/qgroundcontrol,ethz-asl/qgc_asl,scott-eddy/qgroundcontrol,TheIronBorn/qgroundcontrol,mirkix/apm_planner,sutherlandm/apm_planner,cfelipesouza/qgroundcontrol,hejunbok/apm_planner,ethz-asl/qgc_asl,caoxiongkun/qgroundcontrol,LIKAIMO/qgroundcontrol,duststorm/apm_planner,chen0510566/apm_planner,gpaes/apm_planner,kellyschrock/apm_planner,LIKAIMO/apm_planner,diydrones/apm_planner,diydrones/apm_planner,greenoaktree/qgroundcontrol,diydrones/apm_planner,mirkix/apm_planner,scott-eddy/qgroundcontrol,gpaes/apm_planner,lis-epfl/qgroundcontrol,sverling/qgc_asl,kd0aij/qgroundcontrol,labtoast/apm_planner,jy723/qgroundcontrol,dagoodma/qgroundcontrol,dcarpy/apm_planner,sutherlandm/apm_planner,cfelipesouza/qgroundcontrol,mihadyuk/qgroundcontrol,kellyschrock/apm_planner,iidioter/qgroundcontrol,catch-twenty-two/qgroundcontrol,UAVenture/qgroundcontrol,Hunter522/qgroundcontrol,iidioter/qgroundcontrol,LIKAIMO/qgroundcontrol,hejunbok/apm_planner,jy723/qgroundcontrol,abcdelf/apm_planner,cfelipesouza/qgroundcontrol,LittleBun/apm_planner,nado1688/qgroundcontrol,scott-eddy/qgroundcontrol,LittleBun/apm_planner,fizzaly/qgroundcontrol,mrpilot2/apm_planner,LittleBun/apm_planner,josephlewis42/UDenverQGC2,mrpilot2/apm_planner,chen0510566/apm_planner,xros/apm_planner,nado1688/qgroundcontrol,TheIronBorn/qgroundcontrol,hejunbok/apm_planner,LIKAIMO/qgroundcontrol,CornerOfSkyline/qgroundcontrol,jy723/qgroundcontrol,mihadyuk/qgroundcontrol,dagoodma/qgroundcontrol,nado1688/qgroundcontrol,labtoast/apm_planner,dagoodma/qgroundcontrol,Hunter522/qgroundcontrol,abcdelf/apm_planner,mrpilot2/apm_planner,jy723/qgroundcontrol,jy723/qgroundcontrol,CornerOfSkyline/qgroundcontrol,remspoor/qgroundcontrol,scott-eddy/qgroundcontrol,devbharat/qgroundcontrol,diydrones/apm_planner,duststorm/apm_planner,lis-epfl/qgroundcontrol,381426068/apm_planner,sverling/qgc_asl,WorkerBees/apm_planner,RedoXyde/PX4_qGCS,chen0510566/apm_planner,LIKAIMO/qgroundcontrol,gpaes/apm_planner,hejunbok/qgroundcontrol,labtoast/apm_planner,ethz-asl/qgc_asl,BMP-TECH/qgroundcontrol,dcarpy/apm_planner,fizzaly/qgroundcontrol,hejunbok/qgroundcontrol,devbharat/qgroundcontrol,LittleBun/apm_planner,cfelipesouza/qgroundcontrol,LIKAIMO/apm_planner,LIKAIMO/apm_planner,kd0aij/qgroundcontrol,diydrones/apm_planner,kd0aij/qgroundcontrol,UAVenture/qgroundcontrol,xros/apm_planner,kellyschrock/apm_planner,remspoor/qgroundcontrol,UAVenture/qgroundcontrol,kellyschrock/apm_planner,greenoaktree/qgroundcontrol,catch-twenty-two/qgroundcontrol,catch-twenty-two/qgroundcontrol,RedoXyde/PX4_qGCS,dcarpy/apm_planner,mirkix/apm_planner,dagoodma/qgroundcontrol,mrpilot2/apm_planner,LIKAIMO/apm_planner,devbharat/qgroundcontrol,hejunbok/qgroundcontrol,greenoaktree/qgroundcontrol,abcdelf/apm_planner,ethz-asl/qgc_asl,Hunter522/qgroundcontrol,381426068/apm_planner,lis-epfl/qgroundcontrol,catch-twenty-two/qgroundcontrol,sverling/qgc_asl,dcarpy/apm_planner,fizzaly/qgroundcontrol,CornerOfSkyline/qgroundcontrol,sutherlandm/apm_planner,dcarpy/apm_planner,hejunbok/qgroundcontrol,LIKAIMO/apm_planner,Icenowy/apm_planner,caoxiongkun/qgroundcontrol,catch-twenty-two/qgroundcontrol,scott-eddy/qgroundcontrol,RedoXyde/PX4_qGCS,CornerOfSkyline/qgroundcontrol,caoxiongkun/qgroundcontrol,hejunbok/apm_planner,WorkerBees/apm_planner,BMP-TECH/qgroundcontrol,greenoaktree/qgroundcontrol,sverling/qgc_asl,gpaes/apm_planner,josephlewis42/UDenverQGC2,Icenowy/apm_planner,Icenowy/apm_planner,remspoor/qgroundcontrol,BMP-TECH/qgroundcontrol,mihadyuk/qgroundcontrol,fizzaly/qgroundcontrol,BMP-TECH/qgroundcontrol,RedoXyde/PX4_qGCS,sutherlandm/apm_planner,greenoaktree/qgroundcontrol,Hunter522/qgroundcontrol,kd0aij/qgroundcontrol,Icenowy/apm_planner,kd0aij/qgroundcontrol,chen0510566/apm_planner,dagoodma/qgroundcontrol,Hunter522/qgroundcontrol,hejunbok/apm_planner,BMP-TECH/qgroundcontrol,mrpilot2/apm_planner,kellyschrock/apm_planner,UAVenture/qgroundcontrol,lis-epfl/qgroundcontrol,mirkix/apm_planner,dagoodma/qgroundcontrol,CornerOfSkyline/qgroundcontrol,Hunter522/qgroundcontrol,mrpilot2/apm_planner,kellyschrock/apm_planner,hejunbok/qgroundcontrol,sutherlandm/apm_planner,duststorm/apm_planner,jy723/qgroundcontrol,cfelipesouza/qgroundcontrol,381426068/apm_planner,mihadyuk/qgroundcontrol