[Patches] [Patch #100836] Trivial fix to stop a compiler warning.

[Alex Coventry]

Yeah, I think it does mean something: the problem is that the signature
for chown is int chown(const char *path, uid_t owner, gid_t group), but
the uid_t and gid_t types are compatible with int's, as far as I can
tell.

The alternative would be to change the signature for the function
pointer accepted by posix_strintint.  Since posix_strintint is only
called where I am doing the cast, that might be the better way to go. 

Alex.