pgsql-server: Minor cleanup of libpq/LO examples: fix some memory leaks,

Log Message:
-----------
Minor cleanup of libpq/LO examples: fix some memory leaks, update a comment
or two.

Modified Files:
--------------
pgsql-server/src/test/examples:
testlibpq.c (r1.12 -> r1.13)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/test/examples/testlibpq.c.diff?r1=1.12&r2=1.13)
testlibpq4.c (r1.9 -> r1.10)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/test/examples/testlibpq4.c.diff?r1=1.9&r2=1.10)
testlo.c (r1.22 -> r1.23)
(http://developer.postgresql.org/cvsweb.cgi/pgsql-server/src/test/examples/testlo.c.diff?r1=1.22&r2=1.23)