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/combobox.cpp

@@ -156,6 +156,7 @@ bool wxComboBox::Create( wxWindow *parent, wxWindowID id, const wxString& value,
 void wxComboBox::GTKCreateComboBoxWidget()
 {
     m_widget = gtk_combo_box_entry_new_text();
+    g_object_ref(m_widget);
 
     m_entry = GTK_ENTRY(GTK_BIN(m_widget)->child);
 }