[ROUTE] PMTU only works on half the time

[Herbert Xu <herbert@xxxxxxxxxxxxxxxxxxx>]

Hi Dave:

I found out that PMTU only works on those routing cache entries where
rt_src != 0.  This patch should make it work for all matching entries.

Cheers,
-- 
Debian GNU/Linux 3.0 is out! ( http://www.debian.org/ )
Email:  Herbert Xu ~{PmV>HI~} <herbert@xxxxxxxxxxxxxxxxxxx>
Home Page: http://gondor.apana.org.au/~herbert/
PGP Key: http://gondor.apana.org.au/~herbert/pubkey.txt

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