read-xauth-entry doesn't handle empty string for number field

[sabetts]

This base64 encoded .XAuthority file breaks read-xauth-entry. It's the 4th entry that breaks it.

steps to reproduce:

1. base64 decode this file and save it somewhere:

AAAABKwRqm4AATAAEk1JVC1NQUdJQy1DT09LSUUtMQAQFQ9gIfF5tJYrNva+w5NQlAAGABD+
gAAAAAAAAAIkVP/+mgWLAAEwABJNSVQtTUFHSUMtQ09PS0lFLTEAEBUPYCHxebSWKzb2vsOT
UJQBAAAEYXJjaAABMAASTUlULU1BR0lDLUNPT0tJRS0xABAVD2Ah8Xm0lis29r7Dk1CUAPwA
AAAAABJNSVQtTUFHSUMtQ09PS0lFLTEAEIeK/9/M6kB1huLzpUT9JtsAAAAEfwAAAQABMQAS
TUlULU1BR0lDLUNPT0tJRS0xABC5ScGiDUUsDC5hGetC+chmAQAABGFyY2gAATEAEk1JVC1N
QUdJQy1DT09LSUUtMQAQuUnBog1FLAwuYRnrQvnIZgAAAAR/AAABAAEyABJNSVQtTUFHSUMt
Q09PS0lFLTEAEBEIvywuCk6cr1hC7BzdJecBAAAEYXJjaAABMgASTUlULU1BR0lDLUNPT0tJ
RS0xABARCL8sLgpOnK9YQuwc3SXn

1. run this code. Point it to your decoded file:

(with-open-file (s #p"/path/to/xauthority-file" :element-type '(unsigned-byte 8)) (xlib::read-xauth-entry s) (xlib::read-xauth-entry s) (xlib::read-xauth-entry s) (xlib::read-xauth-entry s))

[mschristiansen]

+1 Same problem here.