K 10
svn:author
V 3
kan
K 8
svn:date
V 27
2014-08-21T15:10:10.500990Z
K 7
svn:log
V 289
Add guards to ptrdiff_t definition in include/stddef.h

Back in 2011 obrien has added the #define macro in sys/sys/stddef.h to
guard ptrdiff_t. Add similar protection to the identical code in
include/stddef.h.

Submitted by:   Mariusz Zaborski <oshogbo@FreeBSD.org>
MFC after:      1 week

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