post-review: for svn, fix revision range for when only one revision is given

Review Request #781 — Created March 24, 2009 and discarded — Latest diff uploaded

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Review Board SVN (deprecated)

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When you only give one revision for post review, you expect that only that revision only will be posted.

However, with post review today and svn, if you say --revision-range=r500 that will become r500:HEAD

This patch changes it to r459:r500, which are the changes generated by revision 500 only.
Ran it on my local instance with --revision-range=r457

This became: .../@r456 to .../@r457 which is what I expected