Log Message:
-----------
Add a Win64-specific spin_delay() function.
We can't use the same as before, since MSVC on Win64 doesn't
support inline assembly.
Modified Files:
--------------
pgsql/src/include/storage:
s_lock.h (r1.169 -> r1.170)
(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/include/storage/s_lock.h?r1=1.169&r2=1.170)