HOpenGL uses wrong calling convention for GLU callbacks

on windows (seen on 98&xp), the red book examples
Tess and TessWind (from GLUT/examples/RedBook/)
crash with a segv. 

Fix (tested on win xp only): 
in 
OpenGL/Graphics/Rendering/OpenGL/GLU/Tesselation.h
s, 
change ccall to CALLCONV (which will be stdcall in this 
case) for all foreign import "wrapper" callback generators.

http://www.haskell.org//pipermail/hopengl/2005-
April/000610.html

claus.reinke@talk21.com

Trac metadata

Trac field	Value
Version	6.4
Type	Bug
TypeOfFailure	OtherFailure
Priority	normal
Resolution	ResolvedFixed
Component	libraries (other)
Test case
Differential revisions
BlockedBy
Related
Blocking
CC
Operating system
Architecture

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There seems to be a discrepancy between the GLU header shipped 
with X11 and with MinGW regarding this aspect, but applying the 
proposed change seems to be safe because only WinDoze will be 
affected. 
 
Quadrics and NURBS have a similar issue, BTW. 

mentioned in commit b7550b2b

added Pnormal label

mentioned in commit 7d3454be

mentioned in commit 1d5e7b23

mentioned in commit 2149a7bf

mentioned in commit 9906cafa

mentioned in commit 5830a12c

mentioned in commit 7c7bd94d