Fixed site index

modules/world/road_grid.cpp

@@ -254,7 +254,8 @@ void RoadDiagram::process_diagram(const Dictionary &diagram)
 			ge.edge = ge_data["edge"];
 			site.graphedges.write[j] = ge;
 		}
-	       	site.index = site_data["index"];
+	       	site.index = i;
+		site.diagram_index = site_data["index"];
 	       	site.pos = site_data["pos"];
 		site.polygon = site_data["polygon"];
 		site.vertices = site_data["vertices"];

modules/world/road_grid.h

@@ -49,7 +49,7 @@ struct map_site {
 		SITE_EMPTY,
 		SITE_MAX
 	};
-	int index;
+	int index, diagram_index;
 	Vector2 pos;
 	Vector<struct graphedge> graphedges;
 	Vector<Vector2> vertices;