Avoid unnecessary bitwise operation in ChunkXZ2Int (Int?! Int?!! It's a long! Damnit mcp :P). y =/= z in PatchSpawnerAnimals

Signed-off-by: Ross Allan <rallanpcl@gmail.com>
Fix NPE in classloader transforming if an exception is thrown with a null message

Signed-off-by: Ross Allan <rallanpcl@gmail.com>