Log Message:
-----------
Add comment explaining why RelationOpenSmgr() call is not needed.
Modified Files:
--------------
pgsql/src/backend/executor:
execMain.c (r1.262 -> r1.263)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/executor/execMain.c.diff?r1=1.262&r2=1.263)