Build failure on sysv5uw7.1.0: wchar_t typedefs in headers.

[Benjamin Kosnik]

unixware is trying to declare wchar_t. This is bad.

You'll need to use fixincludes to deal with this, or make a 
config/os/sco/bits/os_defines file that 

 #define _WCHAR_T 1

-benjamin

> /usr/include/sys/types.h
> 145	
> 146	#ifndef	_WCHAR_T
> 147	#define	_WCHAR_T
> 148	typedef long  wchar_t;			/* wide character type */
> 149	#endif
> 150