snapshot - src: ...

Log Message:
-----------
... I guess this is from the time where prebuilt table was YES or NO ...
Since now we put the prebuilt table name, we instead must put '' when we want no prebuilt table.

Modified Files:
--------------
    src/pl:
        createLocalSnapshot.pl (r1.4 -> r1.5)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/createLocalSnapshot.pl.diff?r1=1.4&r2=1.5)
        createRemoteSnapshot.pl (r1.3 -> r1.4)
        (http://cvs.pgfoundry.org/cgi-bin/cvsweb.cgi/snapshot/src/pl/createRemoteSnapshot.pl.diff?r1=1.3&r2=1.4)