[epiphany] title-box: Another fixup for the previous commit

[Michael Catanzaro <mcatanzaro src gnome org>]

commit 3fd2f7a051b507ec001a5599d5045ab1bb57bd84
Author: Michael Catanzaro <mcatanzaro gnome org>
Date:   Fri Sep 16 23:24:07 2016 -0500

    title-box: Another fixup for the previous commit
    
    The parent_instance type is wrong... how did it possibly work?
    
    https://bugzilla.gnome.org/show_bug.cgi?id=771229

 src/ephy-title-box.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/src/ephy-title-box.c b/src/ephy-title-box.c
index 8c356fe..a0de247 100644
--- a/src/ephy-title-box.c
+++ b/src/ephy-title-box.c
@@ -33,7 +33,7 @@ enum {
 static guint signals[LAST_SIGNAL];
 
 struct _EphyTitleBox {
-  GtkBox parent_instance;
+  GtkEventBox parent_instance;
 
   GtkWidget *lock_image;
   GtkWidget *title;