ensure that GetEditControl() returns something even if label editing was started by the user and not the program (closes #1325)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53831 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/msw/listctrl.h

@@ -446,6 +446,9 @@ private:
     // UpdateStyle()), only should be called if InReportView()
     void MSWSetExListStyles();
 
+    // initialize the (already created) m_textCtrl with the associated HWND
+    void InitEditControl(WXHWND hWnd);
+
     // destroy m_textCtrl if it's currently valid and reset it to NULL
     void DeleteEditControl();