Fix some more UB

[EllipticEllipsis]

Add casts to two of the ll wrappers to prevent UB (and ASAN shouting about UB), in particular

• multiplying signed integers that won't fit in a u64.
• shifting signed integers by enough that they don't fit in a u64 (this does also remove the UB for shifting negative integers, I'm not sure what IDO would do there or if it's predictable).

In theory this may not always emulate the correct behaviour, but it builds both OoT and MM OK so in the rare cases that it matters it's probably fine.

Also formatted the makefile so it doesn't use tabs for things that are not recipes, this was certainly confusing my VSCode so it probably can cause other problems as well.

[AngheloAlf]

Could you use 4 spaces instead of 2?
Using 2 spaces confuses my vscode and makes it think it should treat tabs as they were 2 spaces instead of 4 which I don't like. This is exactly the reason why I wanted to use tabs instead of spaces here in the first place

[EllipticEllipsis]

Addresses #29