[RESEND]Make wine_glGetString() return NULL on null gl context - Solves Bug 13599

[Massimo Del Fedele]

H. Verbeet ha scritto:
> 2008/7/1 Massimo Del Fedele <max at veneto.com>:
>> +  if(NtCurrentTeb()->glContext == NULL)
>> +    return NULL;
>> +
> Alexandre said on IRC that you should probably use
> wglGetCurrentContext() there, rather than using NtCurrentTeb()
> directly.
> 
> 
> 

As it was used just at top of wgl.c, here :

void enter_gl(void)
{
     Wine_GLContext *curctx = (Wine_GLContext *) NtCurrentTeb()->glContext;

     if (curctx && curctx->do_escape)
     {
         enum x11drv_escape_codes escape = X11DRV_SYNC_PIXMAP;
         ExtEscape(curctx->hdc, X11DRV_ESCAPE, sizeof(escape), 
(LPCSTR)&escape, 0, NULL);
     }

     wine_tsx11_lock_ptr();
     return;
}

I used NtCurrentTeb()....but it can be changed. I'll resend the patch...

Max