ArduSub: correct myggcs to mygcs

not sure what the extra "g" was supposed to be for, best suggestion so far is "great".

Doesn't really add anything, so we should remove it.

Author: peterbarker

ArduSub/GCS_MAVLink_Sub.cpp

@@ -674,7 +674,7 @@ void GCS_MAVLINK_Sub::handle_message(const mavlink_message_t &msg)
         sub.failsafe.last_pilot_input_ms = AP_HAL::millis();
         // a RC override message is considered to be a 'heartbeat'
         // from the ground station for failsafe purposes
-        gcs().sysid_myggcs_seen(AP_HAL::millis());
+        gcs().sysid_mygcs_seen(AP_HAL::millis());
         break;
     }
 

ArduSub/failsafe.cpp

@@ -312,7 +312,7 @@ void Sub::failsafe_gcs_check()
         return;
     }
 
-    const uint32_t gcs_last_seen_ms = gcs().sysid_myggcs_last_seen_time_ms();
+    const uint32_t gcs_last_seen_ms = gcs().sysid_mygcs_last_seen_time_ms();
     if (gcs_last_seen_ms == 0) {
         // we've never seen a GCS, so we don't failsafe if we stop seeing it
         return;