Fixed warning
Merge branch 'master' of github.com:PX4/Firmware
Revert "Fixed warning"

This reverts commit 3639c7ae91f5226b71cdba8d8cc98eae4bba7e07.
mc_att_control: hotfix, memset all structs to zeroes on start, fixes garbage in actuator controls 4..8
Merge branch 'master' into act_group_hotfix