Log Message:
-----------
fixed bug in segfault REVOKE statement
Modified Files:
--------------
pgsql/src/interfaces/ecpg/preproc:
preproc.y (r1.298 -> r1.299)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/preproc/preproc.y.diff?r1=1.298&r2=1.299)