Wub Hammer can cause crash when ore excavating

https://paste.feed-the-beast.com/view/raw/3c8e5aa4
https://paste.feed-the-beast.com/view/8e9f36f9

The bug can be reproduced by moving out of range right as the block is broken. This happens even on single player without excavation.

"result" is dereferenced without being tested for null.

https://github.com/Kashdeya/Tiny-Progressions/blob/1.12.2/src/main/java/com/kashdeya/tinyprogressions/items/tools/wub/WubHammer.java#L46