Review request for MACOSX_PORT-773: scrollbar thumb is not full height in SThumbTest0001

[Alexander Potochkin]

Hello everybody

Please review this simple fix for 
http://java.net/jira/browse/MACOSX_PORT-773

http://cr.openjdk.java.net/~alexp/7122256/webrev.00/

the visible amount property is relative to the minimum and maximum  values,
so the single setValues() method is not equal to the four corresponding 
setters

Thanks
alexp