Do not analyze if sort field selector is rubbish.
authorSami Kerola <kerolasa@iki.fi>
Sat, 22 Jan 2011 21:50:14 +0000 (22:50 +0100)
committerSami Kerola <kerolasa@iki.fi>
Sat, 22 Jan 2011 21:50:14 +0000 (22:50 +0100)
Error message also had a bug, it's changed to be over all more
helpful.

Signed-off-by: Sami Kerola <kerolasa@iki.fi>


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