Merge bugfix from vendor master branch:

Limit write requests to at most INT_MAX.
This prevents a certain common programming error (passing -1 to write)
from leading to other problems deeper in the library.

References:
https://github.com/libarchive/libarchive/commit/22531545514043e0

Reported by:	Xin Li <delphij@FreeBSD.org>
Obtained from:  libarchive (master branch)