Fixing unused variable in Release builds.
Fixing unused variable in Release builds.

mihadyuk/qgroundcontrol,CornerOfSkyline/qgroundcontrol,catch-twenty-two/qgroundcontrol,Hunter522/qgroundcontrol,catch-twenty-two/qgroundcontrol,scott-eddy/qgroundcontrol,RedoXyde/PX4_qGCS,mihadyuk/qgroundcontrol,Hunter522/qgroundcontrol,Hunter522/qgroundcontrol,kd0aij/qgroundcontrol,ethz-asl/qgc_asl,RedoXyde/PX4_qGCS,mihadyuk/qgroundcontrol,Hunter522/qgroundcontrol,RedoXyde/PX4_qGCS,remspoor/qgroundcontrol,remspoor/qgroundcontrol,CornerOfSkyline/qgroundcontrol,RedoXyde/PX4_qGCS,kd0aij/qgroundcontrol,cfelipesouza/qgroundcontrol,catch-twenty-two/qgroundcontrol,cfelipesouza/qgroundcontrol,cfelipesouza/qgroundcontrol,CornerOfSkyline/qgroundcontrol,cfelipesouza/qgroundcontrol,ethz-asl/qgc_asl,ethz-asl/qgc_asl,scott-eddy/qgroundcontrol,catch-twenty-two/qgroundcontrol,ethz-asl/qgc_asl,CornerOfSkyline/qgroundcontrol,kd0aij/qgroundcontrol,ethz-asl/qgc_asl,catch-twenty-two/qgroundcontrol,cfelipesouza/qgroundcontrol,RedoXyde/PX4_qGCS,catch-twenty-two/qgroundcontrol,mihadyuk/qgroundcontrol,cfelipesouza/qgroundcontrol,scott-eddy/qgroundcontrol,remspoor/qgroundcontrol,RedoXyde/PX4_qGCS,remspoor/qgroundcontrol,remspoor/qgroundcontrol,mihadyuk/qgroundcontrol,kd0aij/qgroundcontrol,kd0aij/qgroundcontrol,Hunter522/qgroundcontrol,scott-eddy/qgroundcontrol,scott-eddy/qgroundcontrol,Hunter522/qgroundcontrol,mihadyuk/qgroundcontrol,CornerOfSkyline/qgroundcontrol,kd0aij/qgroundcontrol,remspoor/qgroundcontrol,scott-eddy/qgroundcontrol,CornerOfSkyline/qgroundcontrol