Fix latent bug in crossjumping

[Josef Zlomek]

>  > From: Steven Bosscher <s.bosscher@student.tudelft.nl>
>  > 
>  > Actually I'm *still* finding them...  Like I said in my mail to you, I'm
>  > sure I've seen at least 5 duplicates for ths PR and a few that may be
>  > related.  I should have written down the numbers...
>  > 
>  > Anyway, there's another high-priority bug I forgot to mention that looks
>  > like a duplicate of the PR you fixed: c/7928.
>  > 
>  > Greetz
>  > Steven
> 
> I retested the file from PR7928 and the problem still occurs as of
> last night's 3.4-CVS.  So if your patch fixes it, thanks very much
> Josef. :-)

Could you test the patch on PR7928? On i386 PR7928 can be compiled.

Josef