[gimp] app: Fix dock remove condition

[Martin Nordholts <martinn src gnome org>]

commit ee1f0a8b007236dd3f6a1f72fc32285a444778a2
Author: Martin Nordholts <martinn src gnome org>
Date:   Sun Mar 7 12:59:21 2010 +0100

    app: Fix dock remove condition
    
    Fix dock remove condition in
    gimp_dock_columns_dock_book_removed(). Due to GimpPanedBox the parent
    of a dock is not fixed, so just check for != NULL.

 app/widgets/gimpdockcolumns.c |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/app/widgets/gimpdockcolumns.c b/app/widgets/gimpdockcolumns.c
index f442fdf..3df842e 100644
--- a/app/widgets/gimpdockcolumns.c
+++ b/app/widgets/gimpdockcolumns.c
@@ -275,7 +275,7 @@ gimp_dock_columns_dock_book_removed (GimpDockColumns *dock_columns,
 
   if (gimp_dock_get_dockbooks (dock) == NULL &&
       ! GIMP_IS_TOOLBOX (dock) &&
-      gtk_widget_get_parent (GTK_WIDGET (dock)) == GTK_WIDGET (dock_columns))
+      gtk_widget_get_parent (GTK_WIDGET (dock)) != NULL)
     gimp_dock_columns_remove_dock (dock_columns, dock);
 }