(svn r23316) -Feature: Add ability to zoom in to 2x and 4x level.

src/saveload/afterload.cpp

@@ -2688,6 +2688,13 @@ bool AfterLoadGame()
 		}
 	}
 
+	if (IsSavegameVersionBefore(165)) {
+		/* Adjust zoom level to account for new levels */
+		_saved_scrollpos_zoom = _saved_scrollpos_zoom + ZOOM_LVL_SHIFT;
+		_saved_scrollpos_x *= ZOOM_LVL_BASE;
+		_saved_scrollpos_y *= ZOOM_LVL_BASE;
+	}
+
 	/* When any NewGRF has been changed the availability of some vehicles might
 	 * have been changed too. e->company_avail must be set to 0 in that case
 	 * which is done by StartupEngines(). */