[banshee] SourceRowRenderer: Fix vertical alignment calculation (bgo#637991)

[Bertrand Lorentz <blorentz src gnome org>]

commit 62d2bbfef20703e459f5cf24b711652cf2d7cd8c
Author: Bertrand Lorentz <bertrand lorentz gmail com>
Date:   Sun Jan 2 16:38:42 2011 +0100

    SourceRowRenderer: Fix vertical alignment calculation (bgo#637991)

 .../Banshee.Sources.Gui/SourceRowRenderer.cs       |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/Core/Banshee.ThickClient/Banshee.Sources.Gui/SourceRowRenderer.cs b/src/Core/Banshee.ThickClient/Banshee.Sources.Gui/SourceRowRenderer.cs
index e08e8ed..9d1f77b 100644
--- a/src/Core/Banshee.ThickClient/Banshee.Sources.Gui/SourceRowRenderer.cs
+++ b/src/Core/Banshee.ThickClient/Banshee.Sources.Gui/SourceRowRenderer.cs
@@ -318,7 +318,7 @@ namespace Banshee.Sources.Gui
 
         private int Middle (Gdk.Rectangle area, int height)
         {
-            return area.Y + (int)Math.Round ((double)(area.Height - height) / 2.0) + 1;
+            return area.Y + (int)Math.Round ((double)(area.Height - height) / 2.0, MidpointRounding.AwayFromZero);
         }
 
         public override CellEditable StartEditing (Gdk.Event evnt, Widget widget, string path,