INTFORMAT should support UNSIGNED values

INTFORMAT currently treats the argument as a signed INTEGER.

One should be able to INTFORMAT an UNSIGNED as well.

Currently, if the UNSIGNED value exceeds the range of an 8-byte signed INTEGER, the result returned from INTFORMAT is negative.

UNSIGNED8 uNUM2 := 18446744073709551615;
iNum2 := INTFORMAT(uNum2,20,1);
output(iNum2,NAMED('iNum2'));

returns -0000000000000000001

johnholt lovettbx