GCS_MAVLink: omit code that breaks build for herepro

libraries/GCS_MAVLink/GCS_Common.cpp

@@ -3470,7 +3470,9 @@ void GCS_MAVLINK::handle_common_message(const mavlink_message_t &msg)
 
     case MAVLINK_MSG_ID_RALLY_POINT:
     case MAVLINK_MSG_ID_RALLY_FETCH_POINT:
+#if HAL_RALLY_ENABLED
         handle_common_rally_message(msg);
+#endif
         break;
 
     case MAVLINK_MSG_ID_REQUEST_DATA_STREAM:
@@ -5375,9 +5377,11 @@ uint64_t GCS_MAVLINK::capabilities() const
         ret |= MAV_PROTOCOL_CAPABILITY_FLIGHT_TERMINATION;
     }
 
+#if HAL_RALLY_ENABLED
     if (AP::rally()) {
         ret |= MAV_PROTOCOL_CAPABILITY_MISSION_RALLY;
     }
+#endif
 
     if (AP::fence()) {
         ret |= MAV_PROTOCOL_CAPABILITY_MISSION_FENCE;

libraries/GCS_MAVLink/GCS_Rally.cpp

@@ -21,6 +21,8 @@
 #include <AP_Rally/AP_Rally.h>
 #include <AP_Logger/AP_Logger.h>
 
+#if HAL_RALLY_ENABLED
+
 void GCS_MAVLINK::handle_rally_point(const mavlink_message_t &msg) const
 {
     AP_Rally *r = AP::rally();
@@ -103,3 +105,4 @@ void GCS_MAVLINK::handle_common_rally_message(const mavlink_message_t &msg)
         break;
     }
 }
+#endif //#if HAL_RALLY_ENABLED