[metapost] gdraw and negative numbers

[Taco Hoekwater]

Jørgen Larsen wrote:
> With MetaPost 0.901 the gdraw command (from the graph package) seems to 
> have a problem with negative numbers in axis labels: the minus sign is 
> placed far too low.
> (I have tried the MP that comes with teTeX 3.0 and the MP that comes 
> with XemTeX, and they both give the same (wrong) result.)

I tried myself with the 0.641 executable and also got the same
result. It looks like a problem with the pseudo-typesetting in
the graph package, but I am unfamiliar with that so cannot
quickly help further.

Taco