pgsql-server: Make getpid() use %d consistently for printing.

Log Message:
-----------
Make getpid() use %d consistently for printing.

Modified Files:
--------------
    pgsql-server/src/backend/access/transam:
        xlog.c (r1.171 -> r1.172)

(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/access/transam/xlog.c.diff?r1=1.171&r2=1.172)
    pgsql-server/src/backend/utils/error:
        elog.c (r1.153 -> r1.154)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/backend/utils/error/elog.c.diff?r1=1.153&r2=1.154)
    pgsql-server/src/bin/psql:
        command.c (r1.126 -> r1.127)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/bin/psql/command.c.diff?r1=1.126&r2=1.127)
    pgsql-server/src/interfaces/ecpg/ecpglib:
        misc.c (r1.22 -> r1.23)

(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/interfaces/ecpg/ecpglib/misc.c.diff?r1=1.22&r2=1.23)