[gnome-calendar] views: simplify reference leak workaround

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

commit d283316382e5f7408d1c1776511e1df7672f656d
Author: Georges Basile Stavracas Neto <georges stavracas gmail com>
Date:   Sat Dec 16 21:49:22 2017 -0200

    views: simplify reference leak workaround
    
    Oh so many unecessary casts =(

 src/views/gcal-month-view.c | 13 ++++---------
 src/views/gcal-year-view.c  | 17 ++++++-----------
 2 files changed, 10 insertions(+), 20 deletions(-)
---
diff --git a/src/views/gcal-month-view.c b/src/views/gcal-month-view.c
index 79a9e525..9355b168 100644
--- a/src/views/gcal-month-view.c
+++ b/src/views/gcal-month-view.c
@@ -162,8 +162,6 @@ enum
   N_PROPS
 };
 
-static gpointer month_view_parent_class = NULL;
-
 
 /*
  * Auxiliary functions
@@ -1825,7 +1823,7 @@ gcal_month_view_destroyed (GtkWidget *widget)
       g_clear_object (&self->weather_service);
     }
 
-  GTK_WIDGET_CLASS (month_view_parent_class)->destroy ((GtkWidget*) G_TYPE_CHECK_INSTANCE_CAST (self, 
GTK_TYPE_GRID, GtkGrid));
+  GTK_WIDGET_CLASS (gcal_month_view_parent_class)->destroy (widget);
 }
 
 static void
@@ -2197,6 +2195,9 @@ gcal_month_view_class_init (GcalMonthViewClass *klass)
   widget_class->key_press_event = gcal_month_view_key_press;
   widget_class->scroll_event = gcal_month_view_scroll_event;
 
+  /* FIXME: Hack to deal with broken reference counts */
+  widget_class->destroy = gcal_month_view_destroyed;
+
   container_class = GTK_CONTAINER_CLASS (klass);
   container_class->add = gcal_month_view_add;
   container_class->remove = gcal_month_view_remove;
@@ -2206,8 +2207,6 @@ gcal_month_view_class_init (GcalMonthViewClass *klass)
   g_object_class_override_property (object_class, PROP_MANAGER, "manager");
   g_object_class_override_property (object_class, PROP_WEATHER_SERVICE, "weather-service");
 
-
-
   gtk_widget_class_set_template_from_resource (widget_class, "/org/gnome/calendar/month-view.ui");
 
   gtk_widget_class_bind_template_child (widget_class, GcalMonthView, label_0);
@@ -2225,10 +2224,6 @@ gcal_month_view_class_init (GcalMonthViewClass *klass)
   gtk_widget_class_set_css_name (widget_class, "calendar-view");
 
   g_type_ensure (GCAL_TYPE_MONTH_POPOVER);
-
-  /* FIXME: Hack to deal with broken reference counts */
-  month_view_parent_class = g_type_class_peek_parent (klass);
-  ((GtkWidgetClass *) klass)->destroy = (void (*) (GtkWidget *)) gcal_month_view_destroyed;
 }
 
 static void
diff --git a/src/views/gcal-year-view.c b/src/views/gcal-year-view.c
index ae1386ee..51483ab8 100644
--- a/src/views/gcal-year-view.c
+++ b/src/views/gcal-year-view.c
@@ -130,8 +130,6 @@ enum {
   LAST_PROP
 };
 
-static gpointer year_view_parent_class = NULL;
-
 static void          gcal_view_interface_init                    (GcalViewInterface  *iface);
 static void          gcal_data_model_subscriber_interface_init   (ECalDataModelSubscriberInterface *iface);
 static void          update_weather                              (GcalYearView       *self);
@@ -1611,15 +1609,13 @@ gcal_year_view_destroyed (GtkWidget *widget)
 {
   GcalYearView *self = GCAL_YEAR_VIEW (widget);
 
-  if (self->weather_service != NULL)
+  if (self->weather_service)
     {
-      g_signal_handlers_disconnect_by_func (self->weather_service,
-                                            (GCallback) weather_changed,
-                                            self);
+      g_signal_handlers_disconnect_by_func (self->weather_service, weather_changed, self);
       g_clear_object (&self->weather_service);
     }
 
-  GTK_WIDGET_CLASS (year_view_parent_class)->destroy ((GtkWidget*) G_TYPE_CHECK_INSTANCE_CAST (self, 
GTK_TYPE_BOX, GtkGrid));
+  GTK_WIDGET_CLASS (gcal_year_view_parent_class)->destroy (widget);
 }
 
 static void
@@ -1990,6 +1986,9 @@ gcal_year_view_class_init (GcalYearViewClass *klass)
   widget_class->size_allocate = gcal_year_view_size_allocate;
   widget_class->direction_changed = gcal_year_view_direction_changed;
 
+  /* Hack to deal with broken reference counts */
+  widget_class->destroy = gcal_year_view_destroyed;
+
   g_object_class_override_property (object_class, PROP_DATE, "active-date");
   g_object_class_override_property (object_class, PROP_MANAGER, "manager");
   g_object_class_override_property (object_class, PROP_WEATHER_SERVICE, "weather-service");
@@ -2028,10 +2027,6 @@ gcal_year_view_class_init (GcalYearViewClass *klass)
   gtk_widget_class_bind_template_callback (widget_class, popover_closed_cb);
 
   gtk_widget_class_set_css_name (widget_class, "calendar-view");
-
-  /* Hack to deal with broken reference counts: */
-  year_view_parent_class = g_type_class_peek_parent (klass);
-  ((GtkWidgetClass *) klass)->destroy = (void (*) (GtkWidget *)) gcal_year_view_destroyed;
 }
 
 static void