psppire-data-window: Destroy dataset from finalize.

One rule of thumb for "destroy" is that it should just unref
GObjects.  This commit fixes that up for
psppire_data_window_dispose().  Previously, this could not be done
because of a reference leak in psppire_data_window_finish_init()
that caused doing the dataset destroy in finalize to crash, but
that problem was fixed in the previous commit.

diff --git a/src/ui/gui/psppire-data-window.c b/src/ui/gui/psppire-data-window.c
index a465ff8e21f411b85b7a9c197ac38dc93a63b896..f6bd2efbd979b1063f745bc709129c4b1c3b674c 100644 (file)
--- a/src/ui/gui/psppire-data-window.c
+++ b/src/ui/gui/psppire-data-window.c
@@ -79,6 +79,7 @@ static void psppire_data_window_init          (PsppireDataWindow      *data_edit
 static void psppire_data_window_iface_init (PsppireWindowIface *iface);
 
 static void psppire_data_window_dispose (GObject *object);
+static void psppire_data_window_finalize (GObject *object);
 static void psppire_data_window_set_property (GObject         *object,
                                               guint            prop_id,
                                               const GValue    *value,
@@ -142,6 +143,7 @@ psppire_data_window_class_init (PsppireDataWindowClass *class)
   parent_class = g_type_class_peek_parent (class);
 
   object_class->dispose = psppire_data_window_dispose;
+  object_class->finalize = psppire_data_window_finalize;
   object_class->set_property = psppire_data_window_set_property;
   object_class->get_property = psppire_data_window_get_property;
 
@@ -1213,18 +1215,6 @@ psppire_data_window_dispose (GObject *object)
 {
   PsppireDataWindow *dw = PSPPIRE_DATA_WINDOW (object);
 
-  if (dw->dataset)
-    {
-      struct dataset *dataset = dw->dataset;
-      struct session *session = dataset_session (dataset);
-
-      dw->dataset = NULL;
-
-      dataset_set_callbacks (dataset, NULL, NULL);
-      session_set_active_dataset (session, NULL);
-      dataset_destroy (dataset);
-    }
-
   if (dw->builder != NULL)
     {
       g_object_unref (dw->builder);
@@ -1253,6 +1243,27 @@ psppire_data_window_dispose (GObject *object)
     G_OBJECT_CLASS (parent_class)->dispose (object);
 }
 
+static void
+psppire_data_window_finalize (GObject *object)
+{
+  PsppireDataWindow *dw = PSPPIRE_DATA_WINDOW (object);
+
+  if (dw->dataset)
+    {
+      struct dataset *dataset = dw->dataset;
+      struct session *session = dataset_session (dataset);
+
+      dw->dataset = NULL;
+
+      dataset_set_callbacks (dataset, NULL, NULL);
+      session_set_active_dataset (session, NULL);
+      dataset_destroy (dataset);
+    }
+
+  if (G_OBJECT_CLASS (parent_class)->finalize)
+    G_OBJECT_CLASS (parent_class)->finalize (object);
+}
+
 static void
 psppire_data_window_set_property (GObject         *object,
                                   guint            prop_id,