wgl prototypes missing from wingdi.h

[Tom Schutter]

It appears that although support for binary apps using OpenGL exists
in wine, you cannot compile a Windows OpenGL app using winelib,
because none of the wgl prototypes exist in wingdi.h

These prototypes exist in wgl.h, but that is not installed using "make
install", nor is that where apps would expect them.

--
Tom Schutter (mailto:tom at platte.com)
Platte River Associates, Inc. (http://www.platte.com)