darcs patch: Fix unportable use of sleep(1)

[Simon Marlow]

On 29/08/2009 10:41, Matthias Kilian wrote:
> Sat Aug 29 11:37:20 CEST 2009  Matthias Kilian<kili at outback.escape.de>
>    * Fix unportable use of sleep(1)
>    `sleep 1s' is probably a GNUism; `sleep 1' should do the same in a
>    portable way.

I'll validate and push; thanks.

Simon