Returned value from operator=

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@16245 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/event.h

@@ -743,7 +743,7 @@ public:
 
     virtual wxEvent *Clone() const { return new wxMouseEvent(*this); }
 
-    wxMouseEvent& operator=(const wxMouseEvent& event) { Assign(event); }
+    wxMouseEvent& operator=(const wxMouseEvent& event) { Assign(event); return *this; }
 
 public:
     wxCoord m_x, m_y;