use "new" wx-prefixed macros in samples

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76222 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/mdi/mdi.h

@@ -34,7 +34,7 @@ private:
 
     bool m_dirty;
 
-    DECLARE_EVENT_TABLE()
+    wxDECLARE_EVENT_TABLE();
 };
 
 // Define a new frame
@@ -60,7 +60,7 @@ private:
 
     wxTextCtrl *m_textWindow;
 
-    DECLARE_EVENT_TABLE()
+    wxDECLARE_EVENT_TABLE();
 };
 
 class MyChild : public wxMDIChildFrame
@@ -108,12 +108,12 @@ private:
 
         const unsigned m_numChild;
 
-        DECLARE_EVENT_TABLE()
+        wxDECLARE_EVENT_TABLE();
 
         wxDECLARE_NO_COPY_CLASS(EventHandler);
     };
 
-    DECLARE_EVENT_TABLE()
+    wxDECLARE_EVENT_TABLE();
 };
 
 // menu items ids