[gitg] Do not show diff stat list in dialog when amending

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

commit bfd55d84c6083972860cbf617ef96f9c7172c4e6
Author: Jesse van den Kieboom <jessevdk gmail com>
Date:   Mon Jul 8 18:39:59 2013 +0200

    Do not show diff stat list in dialog when amending

 gitg/commit/gitg-commit-dialog.vala |    6 ++++++
 1 files changed, 6 insertions(+), 0 deletions(-)
---
diff --git a/gitg/commit/gitg-commit-dialog.vala b/gitg/commit/gitg-commit-dialog.vala
index 82da9b6..2efe69c 100644
--- a/gitg/commit/gitg-commit-dialog.vala
+++ b/gitg/commit/gitg-commit-dialog.vala
@@ -477,6 +477,12 @@ class Dialog : Gtk.Dialog
 
        private void update_min_stat_size(int num)
        {
+               if (num == 0)
+               {
+                       d_scrolled_window_stats.hide();
+                       return;
+               }
+
                int n = int.min(num, max_visible_stat_items);
 
                var lastrow = d_list_box_stats.get_row_at_index(n - 1);