psppire-window: Avoid writing null pointer constant as '\0'.

[pspp] / src / ui / gui / psppire-spreadsheet-model.c

diff --git a/src/ui/gui/psppire-spreadsheet-model.c b/src/ui/gui/psppire-spreadsheet-model.c
index d02c1c558c94bcc937ea16881849e95bac4a17f3..d426b556616d143870eb6f0ce096894425b1d3f8 100644 (file)
--- a/src/ui/gui/psppire-spreadsheet-model.c
+++ b/src/ui/gui/psppire-spreadsheet-model.c
@@ -14,7 +14,7 @@
    You should have received a copy of the GNU General Public License
    along with this program.  If not, see <http://www.gnu.org/licenses/>. */
 
-/* This file implements a GtkTreeModel.  It allows GtkComboBox and 
+/* This file implements a GtkTreeModel.  It allows GtkComboBox and
    GtkTreeView to display the names and non-empty cell ranges of the
    sheets aka "Tables" of spreadsheet files.
    It doesn't take any notice of the spreadsheet data itself.
@@ -99,13 +99,14 @@ psppire_spreadsheet_model_set_property (GObject * object,
                                         const GValue * value,
                                         GParamSpec * pspec)
 {
-  PsppireSpreadsheetModel *spreadsheetModel = 
+  PsppireSpreadsheetModel *spreadsheetModel =
     PSPPIRE_SPREADSHEET_MODEL (object);
 
   switch (prop_id)
     {
     case PROP_SPREADSHEET:
       spreadsheetModel->spreadsheet = g_value_get_pointer (value);
+      spreadsheet_ref (spreadsheetModel->spreadsheet);
       break;
     default:
       G_OBJECT_WARN_INVALID_PROPERTY_ID (object, prop_id, pspec);
@@ -117,6 +118,14 @@ psppire_spreadsheet_model_set_property (GObject * object,
 static void
 psppire_spreadsheet_model_dispose (GObject * object)
 {
+  PsppireSpreadsheetModel *spreadsheetModel = PSPPIRE_SPREADSHEET_MODEL (object);
+
+  if (!spreadsheetModel->dispose_has_run)
+    {
+      spreadsheet_unref (spreadsheetModel->spreadsheet);
+
+      spreadsheetModel->dispose_has_run = TRUE;
+    }
 }
 
 static void
@@ -257,7 +266,7 @@ tree_model_get_value (GtkTreeModel * model, GtkTreeIter * iter,
         const char *x =
           spreadsheet_get_sheet_name (spreadsheetModel->spreadsheet,
                                       (intptr_t) iter->user_data);
-       
+
         g_value_set_string (value, x);
       }
       break;
@@ -343,7 +352,7 @@ tree_model_children (GtkTreeModel *model, GtkTreeIter *iter, GtkTreeIter *parent
 
   iter->stamp = spreadsheetModel->stamp;
   iter->user_data = 0;
-    
+
   return TRUE;
 }