Reported by Marius Bakke.
* gnu/packages/patches/guile-ssh-read-error.patch: New file.
* gnu/local.mk (dist_patch_DATA): Add it.
* gnu/packages/ssh.scm (guile-ssh)[source]: Use it.
(guile2.0-ssh)[source]: New field.
(guile2.2-ssh)[source]: New field.