metrowerks is not implementing the mb calls in libc correctly (always needs correct length param), so we switch to our own conversion code

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@28877 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/strconv.cpp

@@ -1785,6 +1785,8 @@ size_t wxCSConv::WC2MB(char *buf, const wchar_t *psz, size_t n) const
 
 #ifdef __WINDOWS__
     static wxMBConv_win32 wxConvLibcObj;
+#elif defined(__WXMAC__) && !defined(__MACH__)
+    static wxMBConv_mac wxConvLibcObj ;
 #else
     static wxMBConvLibc wxConvLibcObj;
 #endif