attempt at getting rid of unused-function warning

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@76917 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

tests/asserthelper.h

@@ -26,10 +26,10 @@ namespace
         unsigned char m_value;
     };
 
-    std::ostream& operator<<(std::ostream& os, const ColourChannel& cc);
-
 } // anonymous namespace
 
+std::ostream& operator<<(std::ostream& os, const ColourChannel& cc);
+
 // this operator is needed to use CPPUNIT_ASSERT_EQUAL with wxColour objects
 std::ostream& operator<<(std::ostream& os, const wxColour& c);