NPE when adding a changest to a review with no commit message from a SVN Repo

When adding a changeset to a review, if the changeset has no commit message then a NullPointerException is received;

Steps to reproduce;

1. Perform a commit without a message
2. Create a Review
3. Try to add the changeset that contains no commit message
4. NullPointerException error retrieved.

Tested and confirmed with subversion.

The workaround is simply to add a message when performing the commit.