Navigator mavlink_fd rename fix.

src/modules/navigator/mission.cpp

@@ -1089,7 +1089,7 @@ Mission::reset_offboard_mission(struct mission_s &mission)
 			}
 
 		} else {
-			mavlink_and_console_log_critical(_navigator->get_mavlink_fd(), "ERROR: could not read mission");
+			mavlink_and_console_log_critical(_navigator->get_mavlink_log_pub(), "ERROR: could not read mission");
 
 			/* initialize mission state in dataman */
 			mission.dataman_id = 0;