[gimp] libgimpwidgets: make GimpIntStore behave a bit nicer (don't warn)

[Michael Natterer <mitch src gnome org>]

commit 85ea7771d553d0465d70cb963fed980e507532f8
Author: Michael Natterer <mitch gimp org>
Date:   Mon Oct 8 21:32:59 2012 +0200

    libgimpwidgets: make GimpIntStore behave a bit nicer (don't warn)
    
    when used in "unexpected" ways. Where "unexpected" is as simple as
    removing an item from the store.

 libgimpwidgets/gimpintstore.c |   20 +++++++++++++++++++-
 1 files changed, 19 insertions(+), 1 deletions(-)
---
diff --git a/libgimpwidgets/gimpintstore.c b/libgimpwidgets/gimpintstore.c
index 429cd22..2f5f4b3 100644
--- a/libgimpwidgets/gimpintstore.c
+++ b/libgimpwidgets/gimpintstore.c
@@ -70,6 +70,8 @@ static void  gimp_int_store_get_property    (GObject           *object,
 static void  gimp_int_store_row_inserted    (GtkTreeModel      *model,
                                              GtkTreePath       *path,
                                              GtkTreeIter       *iter);
+static void  gimp_int_store_row_deleted     (GtkTreeModel      *model,
+                                             GtkTreePath       *path);
 static void  gimp_int_store_add_empty       (GimpIntStore      *store);
 
 
@@ -123,6 +125,7 @@ gimp_int_store_tree_model_init (GtkTreeModelIface *iface)
   parent_iface = g_type_interface_peek_parent (iface);
 
   iface->row_inserted = gimp_int_store_row_inserted;
+  iface->row_deleted  = gimp_int_store_row_deleted;
 }
 
 static void
@@ -220,7 +223,22 @@ gimp_int_store_row_inserted (GtkTreeModel *model,
       memcmp (iter, store->empty_iter, sizeof (GtkTreeIter)))
     {
       gtk_list_store_remove (GTK_LIST_STORE (store), store->empty_iter);
-      gtk_tree_iter_free (store->empty_iter);
+    }
+}
+
+static void
+gimp_int_store_row_deleted (GtkTreeModel *model,
+                            GtkTreePath  *path)
+{
+  GimpIntStore *store = GIMP_INT_STORE (model);
+
+  if (parent_iface->row_deleted)
+    parent_iface->row_deleted (model, path);
+
+  if (store->empty_iter)
+    {
+      /* freeing here crashes, no clue why. will be freed in finalize() */
+      /* gtk_tree_iter_free (store->empty_iter); */
       store->empty_iter = NULL;
     }
 }