tweak(radar): Suppress under attack radar notification spam (TheSuperHackers#2540)

When PRESERVE_RETAIL_BEHAVIOR is not zero

Author: githubawn

Core/GameEngine/Source/Common/System/Radar.cpp

@@ -1188,7 +1188,14 @@ Bool Radar::tryEvent( RadarEventType event, const Coord3D *pos )
 			// get distance from our new event location to this event location in 2D
 			const Real distSquared = sqr(m_event[ i ].worldLoc.x - pos->x) + sqr(m_event[ i ].worldLoc.y - pos->y);
 
-			if( distSquared <= closeEnoughDistanceSq )
+			Bool isClose = distSquared <= closeEnoughDistanceSq;
+			#if PRESERVE_RETAIL_BEHAVIOR
+				// TheSuperHackers @tweak Preserve retail map-wide suppression for under attack events
+				// because otherwise they trigger way too frequent from cargo planes.
+				isClose |= (event == RADAR_EVENT_UNDER_ATTACK);
+			#endif
+
+			if( isClose )
 			{
 
 				// finally only reject making a new event of this existing one is "recent enough"