Log Message:
-----------
Fix another recently-changed place that was messing with spinlock-
protected data structures and not using a volatile pointer for same.
Modified Files:
--------------
pgsql/src/backend/storage/lmgr:
lwlock.c (r1.32 -> r1.33)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/storage/lmgr/lwlock.c.diff?r1=1.32&r2=1.33)