[metapost] turningnumber bug?

[L. Nobre G.]

I get:

This is MetaPost, Version 0.992 (Web2C 7.5.5)
(danLturningnumberbug.mp
>> -1
>> 1
>> -1 [1] )
1 output file written: danLturningnumberbug.1
Transcript written on danLturningnumberbug.log.

Greetings
-- 
L. Nobre G. - http://lnobreg.googlepages.com/
--
"He's the Teacher ''cause whoever meets him, schools out." quote from
"The Juror" movie