[gtk] revealer: Add a missing break

[Matthias Clasen <matthiasc src gnome org>]

commit f273eca7e36e54241a3eb018e8d3cf68fe320639
Author: Matthias Clasen <mclasen redhat com>
Date:   Fri Mar 29 10:57:51 2019 -0400

    revealer: Add a missing break
    
    This was showing up as the slide-down transition
    being broken.
    
    Closes: https://gitlab.gnome.org/GNOME/gtk/issues/1790

 gtk/gtkrevealer.c | 1 +
 1 file changed, 1 insertion(+)
---
diff --git a/gtk/gtkrevealer.c b/gtk/gtkrevealer.c
index 6dc84603c8..90e1b7d55d 100644
--- a/gtk/gtkrevealer.c
+++ b/gtk/gtkrevealer.c
@@ -410,6 +410,7 @@ gtk_revealer_real_size_allocate (GtkWidget *widget,
 
     case GTK_REVEALER_TRANSITION_TYPE_SLIDE_DOWN:
       transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (0, height - child_height));
+      break;
 
     case GTK_REVEALER_TRANSITION_TYPE_SWING_LEFT:
       transform = gsk_transform_translate (transform, &GRAPHENE_POINT_INIT (width, height / 2));