[libhandy] swipe-tracker: Fix swipeable property type

[Adrien Plazas <aplazas src gnome org>]

commit e8897ab22261d4b73dd6566f9ea6d6c2637d9aef
Author: Alexander Mikhaylenko <alexm gnome org>
Date:   Sat Jun 27 00:49:33 2020 +0500

    swipe-tracker: Fix swipeable property type
    
    It was a GtkWidget long time ago. It's not anymore.
    
    Signed-off-by: Alexander Mikhaylenko <alexm gnome org>

 src/hdy-swipe-tracker.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/hdy-swipe-tracker.c b/src/hdy-swipe-tracker.c
index 1aea8645..1038a460 100644
--- a/src/hdy-swipe-tracker.c
+++ b/src/hdy-swipe-tracker.c
@@ -695,7 +695,7 @@ hdy_swipe_tracker_class_init (HdySwipeTrackerClass *klass)
     g_param_spec_object ("swipeable",
                          _("Swipeable"),
                          _("The swipeable the swipe tracker is attached to"),
-                         GTK_TYPE_WIDGET,
+                         HDY_TYPE_SWIPEABLE,
                          G_PARAM_READWRITE | G_PARAM_CONSTRUCT_ONLY);
 
   /**