Use map rect

cmd/loader/main.go

@@ -127,13 +127,14 @@ func loadMapsFrom(part string) {
 
 	log.Printf("Maps in %s:", mapsPath)
 	for key, gameMap := range gameMaps {
+		rect := gameMap.Rect()
 		hdr := gameMap.Header
 		fmt.Printf(
 			"    * `%s`: IsCampaignMap=%v W=%v:%v L=%v:%v SetName=%s\n",
 			key,
 			hdr.IsCampaignMap,
-			hdr.MinWidth, hdr.MaxWidth,
-			hdr.MinLength, hdr.MaxLength,
+			rect.Min.X, rect.Max.X,
+			rect.Min.Y, rect.Max.Y,
 			string(hdr.SetName[:]),
 		)
 	}