moved the check for correct implementation of wxEvent::Clone() to a unit test from wx startup code

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@59742 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/test_test_gui.dsp

@@ -239,6 +239,10 @@ SOURCE=.\window\clientsize.cpp
 # End Source File
 # Begin Source File
 
+SOURCE=.\events\clone.cpp
+# End Source File
+# Begin Source File
+
 SOURCE=.\controls\comboboxtest.cpp
 # End Source File
 # Begin Source File