[gollem] Patch for more descriptive error reporting

[Chuck Hagenbuch]

Quoting Jeff Graves <jeff at image-src.com>:

> Just more description when something fails. Not neccessary but the
> copy and move functions provide it so I thought the delete function
> should too.

Committed, thanks.

-chuck

--
Charles Hagenbuch, <chuck at horde.org>
"... It is not more light we need, but more warmth! We die of cold, not of
darkness. It is not the night that kills, but the frost." - Miguel de Unamuno