[PATCH] Apply N -> A status change in diff-helper

Hi:

When the git diff status 'N' was changed to 'A', diff-helper.c was
not updated accordingly.  This means that it no longer shows the
diff for newly added files.

This patch makes that change in diff-helper.c.

Signed-off-by: Herbert Xu <herbert@gondor.apana.org.au>

Cheers,
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