[meld] data/ui/patch-dialog.ui: Fix map-without-parent warning

[Kai Willadsen <kaiw src gnome org>]

commit c3e2cd2c02bf07c4373dc74560bafac035ef55fc
Author: Kai Willadsen <kai willadsen gmail com>
Date:   Sun Oct 9 08:11:00 2016 +1000

    data/ui/patch-dialog.ui: Fix map-without-parent warning
    
    If the dialog is set to visible in the builder file, it will get mapped
    before we have set our parent on it, resulting in an annoying warning.

 data/ui/patch-dialog.ui |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/data/ui/patch-dialog.ui b/data/ui/patch-dialog.ui
index eb2ab94..9696c29 100644
--- a/data/ui/patch-dialog.ui
+++ b/data/ui/patch-dialog.ui
@@ -3,7 +3,7 @@
 <interface>
   <requires lib="gtk+" version="3.6"/>
   <object class="GtkDialog" id="patchdialog">
-    <property name="visible">True</property>
+    <property name="visible">False</property>
     <property name="can_focus">False</property>
     <property name="border_width">12</property>
     <property name="title" translatable="yes">Format as Patch</property>