pgsql: Removed some unneeded variables and comparisons

Log Message:
-----------
Removed some unneeded variables and comparisons

Modified Files:
--------------
    pgsql/src/interfaces/ecpg/ecpglib:
        execute.c (r1.82 -> r1.83)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/execute.c?r1=1.82&r2=1.83)
        extern.h (r1.34 -> r1.35)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/extern.h?r1=1.34&r2=1.35)
        prepare.c (r1.29 -> r1.30)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/ecpglib/prepare.c?r1=1.29&r2=1.30)
    pgsql/src/interfaces/ecpg/include:
        ecpglib.h (r1.77 -> r1.78)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/include/ecpglib.h?r1=1.77&r2=1.78)
    pgsql/src/interfaces/ecpg/pgtypeslib:
        datetime.c (r1.35 -> r1.36)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/datetime.c?r1=1.35&r2=1.36)
        dt.h (r1.41 -> r1.42)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/dt.h?r1=1.41&r2=1.42)
        dt_common.c (r1.48 -> r1.49)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/dt_common.c?r1=1.48&r2=1.49)
        interval.c (r1.39 -> r1.40)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/interval.c?r1=1.39&r2=1.40)
        timestamp.c (r1.43 -> r1.44)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/pgtypeslib/timestamp.c?r1=1.43&r2=1.44)
    pgsql/src/interfaces/ecpg/test/expected:
        sql-code100.c (r1.16 -> r1.17)

(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/sql-code100.c?r1=1.16&r2=1.17)
        thread-alloc.c (r1.6 -> r1.7)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/thread-alloc.c?r1=1.6&r2=1.7)
        thread-descriptor.c (r1.5 -> r1.6)

(http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/expected/thread-descriptor.c?r1=1.5&r2=1.6)
    pgsql/src/interfaces/ecpg/test/sql:
        code100.pgc (r1.1 -> r1.2)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/sql/code100.pgc?r1=1.1&r2=1.2)
    pgsql/src/interfaces/ecpg/test/thread:
        alloc.pgc (r1.3 -> r1.4)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/thread/alloc.pgc?r1=1.3&r2=1.4)
        descriptor.pgc (r1.4 -> r1.5)
        (http://anoncvs.postgresql.org/cvsweb.cgi/pgsql/src/interfaces/ecpg/test/thread/descriptor.pgc?r1=1.4&r2=1.5)