[gtk+/gtk-3-20] label: Also initialize text

[Matthias Clasen <matthiasc src gnome org>]

commit b9926f65a39e4a219bad4211371ce64e01fe44a2
Author: Timm Bäder <mail baedert org>
Date:   Thu May 5 11:21:56 2016 +0200

    label: Also initialize text
    
    So gtk_label_get_text returns the default value of "". Broke the
    GtkModelButton default value test.

 gtk/gtklabel.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gtk/gtklabel.c b/gtk/gtklabel.c
index 08e8eb7..83310bb 100644
--- a/gtk/gtklabel.c
+++ b/gtk/gtklabel.c
@@ -1383,7 +1383,7 @@ gtk_label_init (GtkLabel *label)
 
   priv->mnemonic_keyval = GDK_KEY_VoidSymbol;
   priv->layout = NULL;
-  priv->text = NULL;
+  priv->text = g_strdup ("");
   priv->attrs = NULL;
 
   priv->mnemonic_widget = NULL;