cutils - Compatibility for compiling under c++

[andrjohns]

Minor changes needed for compiling cutils.c under C++:

• Explicitly cast when assigning from void* to other types
• digits36 array length forgets null-terminator

[saghul]

Is there a way to add a CI target for this? Otherwise I fear we'll break it over and over again...

[andrjohns]

Is there a way to add a CI target for this? Otherwise I fear we'll break it over and over again...

Yep, but there are still a bunch of changes needed for the other headers/files so I was going to hold off until the full project was compile-able

[saghul]

Do you reckon it would be good to land all changes in a single PR?

[andrjohns]

Do you reckon it would be good to land all changes in a single PR?

Yeah probably makes sense to see it all at once, and then can always split after. Will do!