AP_Mission: add missing breaks to case statement

libraries/AP_Mission/AP_Mission.cpp

@@ -676,6 +676,7 @@ bool AP_Mission::mavlink_to_mission_cmd(const mavlink_mission_item_t& packet, AP
         cmd.content.guided_limits.alt_min = packet.param2;  // min alt below which the command will be aborted.  0 for no lower alt limit
         cmd.content.guided_limits.alt_max = packet.param3;  // max alt above which the command will be aborted.  0 for no upper alt limit
         cmd.content.guided_limits.horiz_max = packet.param4;// max horizontal distance the vehicle can move before the command will be aborted.  0 for no horizontal limit
+        break;
 
     case MAV_CMD_DO_AUTOTUNE_ENABLE:                    // MAV ID: 211
         cmd.p1 = packet.param1;                         // disable=0 enable=1
@@ -988,6 +989,7 @@ bool AP_Mission::mission_cmd_to_mavlink(const AP_Mission::Mission_Command& cmd,
         packet.param2 = cmd.content.guided_limits.alt_min;  // min alt below which the command will be aborted.  0 for no lower alt limit
         packet.param3 = cmd.content.guided_limits.alt_max;  // max alt above which the command will be aborted.  0 for no upper alt limit
         packet.param4 = cmd.content.guided_limits.horiz_max;// max horizontal distance the vehicle can move before the command will be aborted.  0 for no horizontal limit
+        break;
 
     case MAV_CMD_DO_AUTOTUNE_ENABLE:
         packet.param1 = cmd.p1;                         // disable=0 enable=1