(svn r22984) -Feature: Display profit icons for groups in the group GUI.

src/vehicle_func.h

@@ -26,6 +26,9 @@
 #define IS_CUSTOM_FIRSTHEAD_SPRITE(x) (x == 0xFD)
 #define IS_CUSTOM_SECONDHEAD_SPRITE(x) (x == 0xFE)
 
+static const int VEHICLE_PROFIT_MIN_AGE = DAYS_IN_YEAR * 2; ///< Only vehicles older than this have a meaningful profit.
+static const Money VEHICLE_PROFIT_THRESHOLD = 10000;        ///< Threshold for a vehicle to be considered making good profit.
+
 typedef Vehicle *VehicleFromPosProc(Vehicle *v, void *data);
 
 void VehicleServiceInDepot(Vehicle *v);