(svn r9874) -Feature: advanced vehicle lists a.k.a. group interface. Now you can make groups of vehicles and perform all kinds of tasks on that given group. Original code by nycom and graphics by skidd13.

src/openttd.cpp

@@ -63,6 +63,7 @@
 #include "newgrf_house.h"
 #include "newgrf_commons.h"
 #include "player_face.h"
+#include "group.h"
 
 #include "bridge_map.h"
 #include "clear_map.h"
@@ -294,6 +295,7 @@ static void UnInitializeGame()
 	CleanPool(&_Vehicle_pool);
 	CleanPool(&_Sign_pool);
 	CleanPool(&_Order_pool);
+	CleanPool(&_Group_pool);
 
 	free((void*)_town_sort);
 	free((void*)_industry_sort);
@@ -1954,6 +1956,20 @@ bool AfterLoadGame()
 		_opt.diff.number_towns++;
 	}
 
+	/* Recalculate */
+	Group *g;
+	FOR_ALL_GROUPS(g) {
+		const Vehicle *v;
+		FOR_ALL_VEHICLES(v) {
+			if (!IsEngineCountable(v)) continue;
+
+			if (v->group_id != g->index || v->type != g->vehicle_type || v->owner != g->owner) continue;
+
+			g->num_engines[v->engine_type]++;
+		}
+	}
+
+
 	return true;
 }