git-gui: Remove empty blank line at end of blame
git-gui: Remove empty blank line at end of blame

The blame viewer has this silly blank line at the bottom of it;
we really don't want to see it displayed as we will never get
any blame data for that line (it doesn't exist in the source).

Signed-off-by: Shawn O. Pearce <f01032651c12a22b2103346ba96b3b6b231f9d3c@spearce.org>

destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git,destenson/git