pgsql: Warning cleanups for ecpg tests.

Log Message:
-----------
Warning cleanups for ecpg tests. Avoid doing pointer arithmetic on void *,
remove old-style function declarations, and mark a function "static".
There are some remaining warnings, but this fixes most of them, anyway.

Modified Files:
--------------
    pgsql/src/interfaces/ecpg/test:
        dt_test.pgc (r1.7 -> r1.8)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/dt_test.pgc.diff?r1=1.7&r2=1.8)
        dyntest.pgc (r1.10 -> r1.11)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/dyntest.pgc.diff?r1=1.10&r2=1.11)
        dyntest2.pgc (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/dyntest2.pgc.diff?r1=1.5&r2=1.6)
        num_test.pgc (r1.9 -> r1.10)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/num_test.pgc.diff?r1=1.9&r2=1.10)
        perftest.pgc (r1.8 -> r1.9)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/perftest.pgc.diff?r1=1.8&r2=1.9)
        test1.pgc (r1.32 -> r1.33)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test1.pgc.diff?r1=1.32&r2=1.33)
        test2.pgc (r1.42 -> r1.43)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test2.pgc.diff?r1=1.42&r2=1.43)
        test3.pgc (r1.15 -> r1.16)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test3.pgc.diff?r1=1.15&r2=1.16)
        test4.pgc (r1.14 -> r1.15)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test4.pgc.diff?r1=1.14&r2=1.15)
        test5.pgc (r1.5 -> r1.6)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test5.pgc.diff?r1=1.5&r2=1.6)
        test_desc.pgc (r1.3 -> r1.4)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test_desc.pgc.diff?r1=1.3&r2=1.4)
        test_informix.pgc (r1.10 -> r1.11)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test_informix.pgc.diff?r1=1.10&r2=1.11)
        test_init.pgc (r1.4 -> r1.5)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test_init.pgc.diff?r1=1.4&r2=1.5)
        test_thread.pgc (r1.8 -> r1.9)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test_thread.pgc.diff?r1=1.8&r2=1.9)
        test_thread_implicit.pgc (r1.1 -> r1.2)

(http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/test_thread_implicit.pgc.diff?r1=1.1&r2=1.2)
        testdynalloc.pgc (r1.2 -> r1.3)
        (http://developer.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/testdynalloc.pgc.diff?r1=1.2&r2=1.3)