revert r60023 and really fixed compilation problems caused by r60017 by providing assertEquals(const char *, const char *) overload as well

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@60024 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/cppunit.h

@@ -87,6 +87,15 @@ CPPUNIT_NS_BEGIN
 
 // provide an overload of cppunit assertEquals(T, T) which can be used to
 // compare wxStrings directly with C strings
+inline void
+assertEquals(const char *expected,
+             const char *actual,
+             CppUnit::SourceLine sourceLine,
+             const std::string& message)
+{
+    assertEquals(wxString(expected), wxString(actual), sourceLine, message);
+}
+
 inline void
 assertEquals(const char *expected,
              const wxString& actual,