first phase of transition to unified Unicode build:

1. changed c_str() to return wxCStrData (implicitly convertible to wxChar*)
2. added template type-safe wrappers for vararg functions
3. added wxUniChar class representing single Unicode character
4. changed wxString::operator[] and wxString::iterator to return wxUniChar


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@44865 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/longlong.cpp

@@ -1263,7 +1263,7 @@ WXDLLIMPEXP_BASE wxTextOutputStream& operator<< (wxTextOutputStream& o, const wx
     return o << ll.ToString();
 }
 
-#define READ_STRING_CHAR(s, idx, len) ((wxChar) ((idx!=len) ? s[idx++] : 0))
+#define READ_STRING_CHAR(s, idx, len) ((idx!=len) ? (wxChar)s[idx++] : _T('\0'))
 
 WXDLLIMPEXP_BASE class wxTextInputStream &operator>>(class wxTextInputStream &o, wxULongLong &ll)
 {