Fix loading of bridges from Spring 2013 Patchpack v2.1.147 and later

src/saveload/afterload.cpp

@@ -666,7 +666,7 @@ bool AfterLoadGame()
 				SB(_m[t].type, 2, 2, 0);
 			}
 		}
-	} else if (SlXvIsFeaturePresent(XSLFI_HEIGHT_8_BIT)) {
+	} else if (IsSavegameVersionBefore(SLV_194) && SlXvIsFeaturePresent(XSLFI_HEIGHT_8_BIT)) {
 		for (TileIndex t = 0; t < map_size; t++) {
 			SB(_m[t].type, 0, 2, GB(_me[t].m6, 0, 2));
 			SB(_me[t].m6, 0, 2, 0);