Fix NULL reference
Fix NULL reference

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