commit 233a01fa upstream.

If the number in "user_id=N" or "group_id=N" mount options was larger than
INT_MAX then fuse returned EINVAL.

Fix this to handle all valid uid/gid values.
Signed-off-by: Miklos Szeredi <mszeredi@suse.cz>
Signed-off-by: Jiri Slaby <jslaby@suse.cz>