executeUpdate should autobox primitive values

[steipete]

Hit me by chance that adding a plain integer to executeUpdate just crashes at like 772 in FMDatabase.m ( obj = va_arg(args, id);) ... we could be a little smarter and provide auto-boxing for such cases.

If this is interesting, I might send a pull request.

[steipete]

I see... that's not even possible with va_list. Would be nice though.