pg-migrator - pg_migrator: Reorganize location of version check

Log Message:
-----------
Reorganize location of version check routines;  improve error handling.

Modified Files:
--------------
    pg_migrator/src:
        Makefile (r1.7 -> r1.8)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/Makefile?r1=1.7&r2=1.8)
        check.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/check.c?r1=1.3&r2=1.4)
        controldata.c (r1.30 -> r1.31)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/controldata.c?r1=1.30&r2=1.31)
        exec.c (r1.18 -> r1.19)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/exec.c?r1=1.18&r2=1.19)
        file.c (r1.34 -> r1.35)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/file.c?r1=1.34&r2=1.35)
        info.c (r1.36 -> r1.37)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/info.c?r1=1.36&r2=1.37)
        option.c (r1.31 -> r1.32)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/option.c?r1=1.31&r2=1.32)
        pg_migrator.c (r1.100 -> r1.101)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/pg_migrator.c?r1=1.100&r2=1.101)
        pg_migrator.h (r1.97 -> r1.98)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/pg_migrator.h?r1=1.97&r2=1.98)
        relfilenode.c (r1.43 -> r1.44)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/relfilenode.c?r1=1.43&r2=1.44)
        tablespace.c (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/tablespace.c?r1=1.3&r2=1.4)
        util.c (r1.12 -> r1.13)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/util.c?r1=1.12&r2=1.13)
        version.c (r1.39 -> r1.40)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/version.c?r1=1.39&r2=1.40)

Added Files:
-----------
    pg_migrator/src:
        version_old_8_3.c (r1.1)

(http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/pg-migrator/pg_migrator/src/version_old_8_3.c?rev=1.1&content-type=text/x-cvsweb-markup)