Log Message:
-----------
Fix logic error in tbm_intersect: the intersection of a normal page and
a lossy page has to be lossy, because we don't know exactly which tuples
on the page should remain part of the bitmap. Per Jie Zhang.
Modified Files:
--------------
pgsql/src/backend/nodes:
tidbitmap.c (r1.4 -> r1.5)
(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/backend/nodes/tidbitmap.c.diff?r1=1.4&r2=1.5)