[gtk] reftests: Fix grid-empty-with-spacing test

[Benjamin Otte <otte src gnome org>]

commit fbc8bb979d3f31ae645281d37df0e5a4a373e62b
Author: Benjamin Otte <otte redhat com>
Date:   Fri Mar 29 05:42:56 2019 +0100

    reftests: Fix grid-empty-with-spacing test
    
    Widgets are visible by default now, so make sure the ones that should be
    invisible are marked as such.

 testsuite/reftests/grid-empty-with-spacing.ui | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/testsuite/reftests/grid-empty-with-spacing.ui b/testsuite/reftests/grid-empty-with-spacing.ui
index 3598fc71a5..23f0caaf6c 100644
--- a/testsuite/reftests/grid-empty-with-spacing.ui
+++ b/testsuite/reftests/grid-empty-with-spacing.ui
@@ -12,6 +12,7 @@
         <property name="column_spacing">5</property>
         <child>
           <object class="GtkLabel" id="label1">
+            <property name="visible">False</property>
             <property name="can_focus">False</property>
             <property name="label" translatable="yes">invisible</property>
           </object>