gobject: fix G_DEFINE_TYPE_EXTENDED docs so code snippet actually compiles

Flags being used in the G_DEFINE_TYPE_EXTENDED sample was "0", so it
should expand to 0 as well, otherwise the compiler would bark with:
maman-bar.c: In function ‘maman_bar_get_type’:
maman-bar.c:36:53: error: ‘flags’ undeclared (first use in this function)
maman-bar.c:36:53: note: each undeclared identifier is reported only once for each function it appears in

https://bugzilla.gnome.org/show_bug.cgi?id=697250

diff --git a/gobject/gtype.h b/gobject/gtype.h
index 8a1bff2..f6f6f93 100644 (file)
--- a/gobject/gtype.h
+++ b/gobject/gtype.h
@@ -1406,7 +1406,7 @@ guint     g_type_get_type_registration_serial (void);
  *                                        (GClassInitFunc) gtk_gadget_class_intern_init,
  *                                        sizeof (GtkGadget),
  *                                        (GInstanceInitFunc) gtk_gadget_init,
- *                                        (GTypeFlags) flags);
+ *                                        0);
  *       {
  *         const GInterfaceInfo g_implement_interface_info = {
  *           (GInterfaceInitFunc) gtk_gadget_gizmo_init