[gnome-todo] task-list-view: Fix signal callback signature

[Georges Basile Stavracas Neto <gbsneto src gnome org>]

commit 7ed2cf998e43bad9dad2690cef4cc699a80b1aa9
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Thu Feb 20 09:52:20 2020 -0300

    task-list-view: Fix signal callback signature

 src/task-list-view/gtd-task-list-view.c | 6 +++---
 1 file changed, 3 insertions(+), 3 deletions(-)
---
diff --git a/src/task-list-view/gtd-task-list-view.c b/src/task-list-view/gtd-task-list-view.c
index 89af6e6..2ccc31a 100644
--- a/src/task-list-view/gtd-task-list-view.c
+++ b/src/task-list-view/gtd-task-list-view.c
@@ -798,7 +798,7 @@ on_drop_target_drag_leave_cb (GtkDropTarget   *drop_target,
   check_dnd_scroll (self, TRUE, -1);
 }
 
-static gboolean
+static void
 on_drop_target_drag_motion_cb (GtkDropTarget   *drop_target,
                                GdkDrop         *drop,
                                gint             x,
@@ -859,11 +859,11 @@ on_drop_target_drag_motion_cb (GtkDropTarget   *drop_target,
 success:
   gdk_drop_status (drop, GDK_ACTION_MOVE);
   check_dnd_scroll (self, FALSE, y);
-  GTD_RETURN (TRUE);
+  GTD_RETURN ();
 
 fail:
   gdk_drop_status (drop, 0);
-  GTD_RETURN (FALSE);
+  GTD_RETURN ();
 }
 
 static gboolean