Fix wxAcceleratorEntry memory leaks in the menu test

Use wxScopedPtr to ensure that all the test accelerator entries are
destroyed instead of just being leaked.

tests/menu/menu.cpp

@@ -20,6 +20,7 @@
 #endif // WX_PRECOMP
 
 #include "wx/menu.h"
+#include "wx/scopedptr.h"
 #include "wx/translation.h"
 #include "wx/uiaction.h"
 
@@ -624,7 +625,9 @@ namespace
 
 void VerifyAccelAssigned( wxString labelText, int keycode )
 {
-    wxAcceleratorEntry* entry = wxAcceleratorEntry::Create( labelText );
+    const wxScopedPtr<wxAcceleratorEntry> entry(
+        wxAcceleratorEntry::Create( labelText )
+    );
 
     CHECK( entry );
     CHECK( entry->GetKeyCode() == keycode );