[gtk] reftests: Fix label-sizing test

[Benjamin Otte <otte src gnome org>]

commit b88c9439aa9de542dd51e465f67cd678639ea65a
Author: Benjamin Otte <otte redhat com>
Date:   Fri Mar 29 07:55:52 2019 +0100

    reftests: Fix label-sizing test
    
    Set border, padding and margin to 0, not just padding.

 testsuite/reftests/label-sizing.css | 2 ++
 1 file changed, 2 insertions(+)
---
diff --git a/testsuite/reftests/label-sizing.css b/testsuite/reftests/label-sizing.css
index 809b68e17f..4e9dad62ad 100644
--- a/testsuite/reftests/label-sizing.css
+++ b/testsuite/reftests/label-sizing.css
@@ -1,6 +1,8 @@
 * {
   font: 12px Monospace;
   padding: 0;
+  border: none;
+  margin: 0;
 }
 
 GtkPaned label {