[ 1493802 ] Allow multiple wxComboCtrl::SetPopupControl calls.

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@39311 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/combo.h

@@ -375,6 +375,9 @@ protected:
     // Creates popup window, calls interface->Create(), etc
     void CreatePopup();
 
+    // Destroy popup window and all related constructs
+    void DestroyPopup();
+
     // override the base class virtuals involved in geometry calculations
     virtual void DoMoveWindow(int x, int y, int width, int height);
     virtual wxSize DoGetBestSize() const;