Remove double friend class
Remove double friend class

Fix linux compiler warning

iidioter/qgroundcontrol,BMP-TECH/qgroundcontrol,dagoodma/qgroundcontrol,devbharat/qgroundcontrol,RedoXyde/PX4_qGCS,Hunter522/qgroundcontrol,hejunbok/qgroundcontrol,RedoXyde/PX4_qGCS,jy723/qgroundcontrol,dagoodma/qgroundcontrol,scott-eddy/qgroundcontrol,BMP-TECH/qgroundcontrol,devbharat/qgroundcontrol,greenoaktree/qgroundcontrol,fizzaly/qgroundcontrol,UAVenture/qgroundcontrol,remspoor/qgroundcontrol,caoxiongkun/qgroundcontrol,greenoaktree/qgroundcontrol,iidioter/qgroundcontrol,Hunter522/qgroundcontrol,TheIronBorn/qgroundcontrol,mihadyuk/qgroundcontrol,devbharat/qgroundcontrol,iidioter/qgroundcontrol,scott-eddy/qgroundcontrol,BMP-TECH/qgroundcontrol,scott-eddy/qgroundcontrol,ethz-asl/qgc_asl,caoxiongkun/qgroundcontrol,RedoXyde/PX4_qGCS,ethz-asl/qgc_asl,TheIronBorn/qgroundcontrol,greenoaktree/qgroundcontrol,scott-eddy/qgroundcontrol,ethz-asl/qgc_asl,fizzaly/qgroundcontrol,UAVenture/qgroundcontrol,CornerOfSkyline/qgroundcontrol,hejunbok/qgroundcontrol,caoxiongkun/qgroundcontrol,BMP-TECH/qgroundcontrol,LIKAIMO/qgroundcontrol,LIKAIMO/qgroundcontrol,mihadyuk/qgroundcontrol,fizzaly/qgroundcontrol,kd0aij/qgroundcontrol,devbharat/qgroundcontrol,BMP-TECH/qgroundcontrol,hejunbok/qgroundcontrol,remspoor/qgroundcontrol,UAVenture/qgroundcontrol,cfelipesouza/qgroundcontrol,iidioter/qgroundcontrol,LIKAIMO/qgroundcontrol,catch-twenty-two/qgroundcontrol,iidioter/qgroundcontrol,TheIronBorn/qgroundcontrol,hejunbok/qgroundcontrol,catch-twenty-two/qgroundcontrol,remspoor/qgroundcontrol,LIKAIMO/qgroundcontrol,CornerOfSkyline/qgroundcontrol,devbharat/qgroundcontrol,TheIronBorn/qgroundcontrol,Hunter522/qgroundcontrol,LIKAIMO/qgroundcontrol,dagoodma/qgroundcontrol,RedoXyde/PX4_qGCS,greenoaktree/qgroundcontrol,hejunbok/qgroundcontrol,nado1688/qgroundcontrol,greenoaktree/qgroundcontrol,nado1688/qgroundcontrol,UAVenture/qgroundcontrol,Hunter522/qgroundcontrol,fizzaly/qgroundcontrol,catch-twenty-two/qgroundcontrol,devbharat/qgroundcontrol,cfelipesouza/qgroundcontrol,nado1688/qgroundcontrol,catch-twenty-two/qgroundcontrol,nado1688/qgroundcontrol,RedoXyde/PX4_qGCS,fizzaly/qgroundcontrol,fizzaly/qgroundcontrol,scott-eddy/qgroundcontrol,RedoXyde/PX4_qGCS,mihadyuk/qgroundcontrol,caoxiongkun/qgroundcontrol,jy723/qgroundcontrol,TheIronBorn/qgroundcontrol,CornerOfSkyline/qgroundcontrol,kd0aij/qgroundcontrol,remspoor/qgroundcontrol,TheIronBorn/qgroundcontrol,iidioter/qgroundcontrol,lis-epfl/qgroundcontrol,lis-epfl/qgroundcontrol,lis-epfl/qgroundcontrol,dagoodma/qgroundcontrol,dagoodma/qgroundcontrol,ethz-asl/qgc_asl,jy723/qgroundcontrol,cfelipesouza/qgroundcontrol,catch-twenty-two/qgroundcontrol,Hunter522/qgroundcontrol,cfelipesouza/qgroundcontrol,kd0aij/qgroundcontrol,mihadyuk/qgroundcontrol,nado1688/qgroundcontrol,jy723/qgroundcontrol,UAVenture/qgroundcontrol,caoxiongkun/qgroundcontrol,cfelipesouza/qgroundcontrol,ethz-asl/qgc_asl,jy723/qgroundcontrol,dagoodma/qgroundcontrol,CornerOfSkyline/qgroundcontrol,mihadyuk/qgroundcontrol,BMP-TECH/qgroundcontrol,remspoor/qgroundcontrol,CornerOfSkyline/qgroundcontrol,hejunbok/qgroundcontrol,caoxiongkun/qgroundcontrol,Hunter522/qgroundcontrol,greenoaktree/qgroundcontrol,LIKAIMO/qgroundcontrol,lis-epfl/qgroundcontrol,jy723/qgroundcontrol,mihadyuk/qgroundcontrol,kd0aij/qgroundcontrol,CornerOfSkyline/qgroundcontrol,kd0aij/qgroundcontrol,kd0aij/qgroundcontrol,catch-twenty-two/qgroundcontrol,nado1688/qgroundcontrol,cfelipesouza/qgroundcontrol,lis-epfl/qgroundcontrol,remspoor/qgroundcontrol,scott-eddy/qgroundcontrol,UAVenture/qgroundcontrol