pgsql-server: Stylistic changes in bufmgr.c Basically replaces (*a).b

Log Message:
-----------
Stylistic changes in bufmgr.c

Basically replaces (*a).b with a->b as it is everywhere else in
Postgres.

Manfred Koizar

Modified Files:
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pgsql-server/src/backend/storage/page:
bufpage.c (r1.57 -> r1.58)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/storage/page/bufpage.c.diff?r1=1.57&r2=1.58)