PATCH: Support __WORDSIZE == 64 in i386/bits/wchar.h

[Roland McGrath]

> These macros must be usable in #if conditions, so they cannot contain 
> casts.  (I haven't yet got that far in making the conform/ tests assert 
> such things; I still have two C90 headers to do before going onto C90 
> Amendment 1 headers and then C99 and C11 headers.)

D'oh.  I thought about the assembler case but forgot about the #if case.