Hold a reference on m_widget for the life of the associated wxWindow object.

This allows removing some ugly hacks, and leaking of GtkWidgets by wxNotebook.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@55288 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/gtk/spinctrl.cpp

@@ -113,6 +113,7 @@ bool wxSpinCtrlGTKBase::Create(wxWindow *parent, wxWindowID id,
     }
 
     m_widget = gtk_spin_button_new_with_range(min, max, inc);
+    g_object_ref(m_widget);
 
     gtk_spin_button_set_value( GTK_SPIN_BUTTON(m_widget), initial);
     m_value = gtk_spin_button_get_value( GTK_SPIN_BUTTON(m_widget));