[gitg] Do not color removed/added when nothing removed and nothing added

[Jesse van den Kieboom <jessevdk src gnome org>]

commit 7d6524c0114504986503a903a16b2fe1616edd9e
Author: Jesse van den Kieboom <jessevdk gnome org>
Date:   Mon Dec 21 22:38:25 2015 +0100

    Do not color removed/added when nothing removed and nothing added

 libgitg/gitg-diff-stat.vala |    9 +++++++--
 1 files changed, 7 insertions(+), 2 deletions(-)
---
diff --git a/libgitg/gitg-diff-stat.vala b/libgitg/gitg-diff-stat.vala
index 6a59989..f7fcb5a 100644
--- a/libgitg/gitg-diff-stat.vala
+++ b/libgitg/gitg-diff-stat.vala
@@ -158,8 +158,13 @@ public class Gitg.DiffStat : Gtk.DrawingArea
                        x -= padding.right + wbar;
                }
 
-               if (added == 0 ||
-                   removed == 0)
+               if (added == 0 && removed == 0)
+               {
+                       sctx.save();
+                       sctx.render_background(context, x, ybar, wrest, hbar);
+                       sctx.restore();
+               }
+               else if (added == 0 || removed == 0)
                {
                        sctx.save();
                        sctx.add_class(added == 0 ? "removed-only" : "added-only");