[gnome-flashback/gnome-3-18] input-sources: fix "add hover pseudo class to GfCandidateBox" commit

[Alberts Muktupāvels <muktupavels src gnome org>]

commit 7774a5e399f710ace26d04428b9d29da6c1987ad
Author: Alberts Muktupāvels <alberts muktupavels gmail com>
Date:   Mon Jan 18 14:22:49 2016 +0200

    input-sources: fix "add hover pseudo class to GfCandidateBox" commit

 .../libinput-sources/gf-candidate-box.c            |    2 ++
 1 files changed, 2 insertions(+), 0 deletions(-)
---
diff --git a/gnome-flashback/libinput-sources/gf-candidate-box.c 
b/gnome-flashback/libinput-sources/gf-candidate-box.c
index 9fac19e..f1bb2ff 100644
--- a/gnome-flashback/libinput-sources/gf-candidate-box.c
+++ b/gnome-flashback/libinput-sources/gf-candidate-box.c
@@ -105,8 +105,10 @@ static void
 gf_candidate_box_class_init (GfCandidateBoxClass *box_class)
 {
   GObjectClass *object_class;
+  GtkWidgetClass *widget_class;
 
   object_class = G_OBJECT_CLASS (box_class);
+  widget_class = GTK_WIDGET_CLASS (box_class);
 
   object_class->set_property = gf_candidate_box_set_property;