[metapost] Bug with simple number comparisons with new number systems

[Akira Kakuto]

Hi,

> Thank you for the report, I will investigate soon.

The present trunk version, changed after the report by Daniel H. Luecking
gives:

>> true
>> "scaled"
>> "1.999" )

>> true
>> "double"
>> "1.999" )

>> true
>> "binary"
>> "1.999" )

>> true
>> "decimal"
>> "1.999" )

Thanks,
-- 
Akira