Fixed another typo "create" to "crate"

Fixed typo

pacman 6.0.0 now dups it for you.

This also lets git builds run in CI as the build script never pulls
in alpm.

This function is the same as from_cstr_optional but returns "" instead
of None. This makes it more clear what functions should actually return
an Option for when it's time to change them. This also allows
from_cstr to go back to the faster unchecked version.

Perviously, when getting a pointer to a union field we did:

	let inner = &mut unsafe { (*self.inner).replace }

Due to the &mut being outside the unsafe block this actually takes
a reference to a temporary variables instead of the union filed.

It effectively looks like:

	let tmp = unsafe { (*self.inner).replace };
	let inner = &mut tmp //reference to stack data

The fix is to just move the &mut into the safe block, making rust not
create a temporary variable and actually reference the union.

This may fail to allocate memory even with good input.

Stopgap for functions that return str but should return Option<str>