[gimp] app: fix dockbook tab border values.

[Jehan Pagès <jehanp src gnome org>]

commit a88afe485a8231b1203ef4dfa26944121d319b57
Author: Jehan <jehan girinstud io>
Date:   Sat Mar 11 03:35:14 2017 +0100

    app: fix dockbook tab border values.
    
    Argh! Always triple-check commits before pushing!
    Commit e30c92c had completely wrong big values, which I was using
    to make tab border update really visible while testing.

 app/widgets/gimpdockbook.c |    4 ++--
 1 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/app/widgets/gimpdockbook.c b/app/widgets/gimpdockbook.c
index 664e0de..ddcc919 100644
--- a/app/widgets/gimpdockbook.c
+++ b/app/widgets/gimpdockbook.c
@@ -1651,10 +1651,10 @@ gimp_dockbook_get_tab_border (GimpDockbook *dockbook)
       tab_border /= 2;
       break;
     case GIMP_ICON_SIZE_LARGE:
-      tab_border *= 10;
+      tab_border *= 2;
       break;
     case GIMP_ICON_SIZE_HUGE:
-      tab_border *= 30;
+      tab_border *= 3;
       break;
     default:
       /* GIMP_ICON_SIZE_MEDIUM and GIMP_ICON_SIZE_DEFAULT: