[patch] Fix internal error on library without dirname

[Tom Tromey]

>>>>> "Jan" == Jan Kratochvil <jan.kratochvil@redhat.com> writes:

Jan> Used - hopefully OK:
Jan>    /* Strip off the final filename part, leaving the directory name,
Jan> -     followed by a slash.  Objfile names should always be absolute and
Jan> -     tilde-expanded, so there should always be a slash in there
Jan> -     somewhere.  */
Jan> +     followed by a slash.  The directory can be relative or absolute.  */

Looks fine.  Thanks again.

Tom