WGL: fix wglGetProcAddress bug

[Roderick Colenbrander]

Vitaly just pointed out that the previous version added some extra spaces. This one fixes that.

Roderick

> Hi,
> 
> This patch fixes a nasty wglGetProcAddress bug. In case the name of an
> unknown GL extension (one which is not in wine yet) was passed to
> wglGetProcAddress it was assumed that it was a WGL extension.
> 
> WGL extensions are in the end looked up in winex11.drv. The
> wglGetProcAddress function in winex11.drv can return WGL extensions but it can also
> return native GL functions. This ability is used in order to fill the opengl32
> thunks (win32 GL -> native GL).
> 
> The problem was that unknown extensions were also passed to the
> winex11.drv code. This resulted that code to look up a native GL functions (the
> winex11.drv code returns wgl extensions if the function name starts with 'wgl'
> and else it calls glXGetProcAddress).
> 
> In the end this patch makes sure that only functions which start with a
> 'w' are passed to the winex11.drv code in the other cases a warning is
> printed that the function wasn't found.
> 
> Regards,
> Roderick Colenbrander

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