[ 1957970 ] wxWeakRef - assign from other wxWeakRef

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@53470 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/weakref.h

@@ -200,6 +200,12 @@ public:
         Assign(pobj);
     }
 
+    // We need this copy ctor, since otherwise a default compiler (binary) copy happens
+    wxWeakRef(const wxWeakRef<T>& wr)
+    {
+        Assign(wr.get());
+    }
+    
     template <class TDerived>
     wxWeakRef<T>& operator=(TDerived* pobj)
     {

interface/weakref.h

@@ -105,6 +105,11 @@ public:
     */
     wxWeakRef(T* pobj = NULL);
 
+    /**
+        Copy constructor.
+    */
+    wxWeakRef(const wxWeakRef<T>& wr);
+    
     /**
         Destructor.
     */