message: Add backwards compatibility macro for TCHAR_TO_WCHAR.
  This macro was only introduced in UE4.20. We copy it if wchar_t and TCHAR differ in size.
diff: #include "Wrappers/UEPyFColor.h"
  #include "Wrappers/UEPyFLinearColor.h"
  +// backward compatibility for UE4.20 TCHAR_TO_WCHAR
  +#ifndef TCHAR_TO_WCHAR
  + // SIZEOF_WCHAR_T is provided by pyconfig.h
  + #if SIZEOF_WCHAR_T == (PLATFORM_TCHAR_IS_4_BYTES ? 4 : 2)
  + #define TCHAR_TO_WCHAR(str) str
  + #else
  + #define TCHAR_TO_WCHAR(str) (wchar_t*)StringCast<wchar_t>(static_cast<const TCHAR*>(str)).Get()
  + #endif
  +#endif
  UWorld *ue_get_uworld(ue_PyUObject *);
  