Missing PageNumber in s-pre-03

[David Antos <xantos@informatics.muni.cz>]

	Hello,

I've used the s-pre-03 style and I encountered a problem with the generated
graphics. The graphics depends on the page number and reads the page number
from the PageNumber variable. Nevertheless, the variable does not get
updated, it is initialized to 1 in the beginning of mpgraph.mp.

It can be solved by putting
PageNumber := \realfolio ;
into the code, but this is a really ugly hack.

Can you please track down where the PageNumber in Start/StopPage MP
environment has been eaten? I expect this problem affects any generated
graphics that depends on page numbers.

Thank you,
D.A.

-- 
Everything should be made as simple as possible, but not simpler.
-- Albert Einstein