further ifacecheck fixes (now only 3.3% of documented methods have a wrong signature\!)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@56756 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

interface/wx/cmndata.h

@@ -661,7 +661,7 @@ public:
     /**
         Assigns print data to this object.
     */
-    void operator =(const wxPrintData& data);
+    wxPrintData& operator =(const wxPrintData& data);
 };