[gnome-panel/gtk3] showdesktop: Fix the size of the icon

[Carlos Garcia Campos <carlosgc src gnome org>]

commit 6dae521ff187dcb2da1969ad017cf5b9e1bcb8f2
Author: Carlos Garcia Campos <carlosgc gnome org>
Date:   Sun Jan 30 11:55:04 2011 +0100

    showdesktop: Fix the size of the icon

 applets/wncklet/showdesktop.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/applets/wncklet/showdesktop.c b/applets/wncklet/showdesktop.c
index c8e21da..3a6d813 100644
--- a/applets/wncklet/showdesktop.c
+++ b/applets/wncklet/showdesktop.c
@@ -167,7 +167,7 @@ update_icon (ShowDesktopData *sdd)
 		break;
 	}
 
-	icon_size = sdd->size - 2 * (focus_width + focus_pad) + thickness;
+	icon_size = sdd->size - 2 * (focus_width + focus_pad) - thickness;
 
 	if (icon_size < 22)
 		icon_size = 16;