pgestraier - pgestraier: support query in which only attribute is

Log Message:
-----------
support query in which only attribute is specified

Modified Files:
--------------
pgestraier:
pgest.c (r1.6 -> r1.7)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgestraier/pgestraier/pgest.c.diff?r1=1.6&r2=1.7)
pgestraier/t:
pgest.t (r1.1 -> r1.2)
(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pgestraier/pgestraier/t/pgest.t.diff?r1=1.1&r2=1.2)