[gtk] reftests: Fix window-height-for-width test

[Benjamin Otte <otte src gnome org>]

commit 8542ac2c423afa84daa9cc6bee822f23f7837560
Author: Benjamin Otte <otte redhat com>
Date:   Wed Mar 27 03:55:18 2019 +0100

    reftests: Fix window-height-for-width test
    
    The dialog's vbox internal child is now called content_area

 testsuite/reftests/window-height-for-width.ref.ui | 2 +-
 testsuite/reftests/window-height-for-width.ui     | 2 +-
 2 files changed, 2 insertions(+), 2 deletions(-)
---
diff --git a/testsuite/reftests/window-height-for-width.ref.ui 
b/testsuite/reftests/window-height-for-width.ref.ui
index 70e3ff1fc5..f6647049af 100644
--- a/testsuite/reftests/window-height-for-width.ref.ui
+++ b/testsuite/reftests/window-height-for-width.ref.ui
@@ -7,7 +7,7 @@
     <property name="resizable">False</property>
     <property name="modal">True</property>
     <property name="use_header_bar">1</property>
-    <child internal-child="vbox">
+    <child internal-child="content_area">
       <object class="GtkBox" id="dialog-vbox2">
         <property name="can_focus">False</property>
         <property name="orientation">vertical</property>
diff --git a/testsuite/reftests/window-height-for-width.ui b/testsuite/reftests/window-height-for-width.ui
index ea273bca85..4200e2e6ed 100644
--- a/testsuite/reftests/window-height-for-width.ui
+++ b/testsuite/reftests/window-height-for-width.ui
@@ -7,7 +7,7 @@
     <property name="resizable">False</property>
     <property name="modal">True</property>
     <property name="use_header_bar">1</property>
-    <child internal-child="vbox">
+    <child internal-child="content_area">
       <object class="GtkBox" id="dialog-vbox2">
         <property name="can_focus">False</property>
         <property name="orientation">vertical</property>