5.5.40 Compatibility with MSVC7.1

The highlighted line fails to compile with the new keyword (it shouldn't be a 
keyword
because of extern "C", but I can't fix the compiler).

 @@ -325,4 +327,5 @@
   PL_EXPORT(void)              Sclearerr(IOSTREAM *s);
   PL_EXPORT(void)              Sseterr(IOSTREAM *s, int which, const char 
*message);
-> PL_EXPORT(int)               Ssetenc(IOSTREAM *s, IOENC new, IOENC *old);
   PL_EXPORT(int)               Sflush(IOSTREAM *s);
   PL_EXPORT(long)              Ssize(IOSTREAM *s);


Suggested fix:
-> PL_EXPORT(int)               Ssetenc(IOSTREAM *s, IOENC knew, IOENC *old);