opengl32/test: do not pass NULL attrib list to wglCreatePBufferARB

[Jérôme Gardou]

Some drivers (gallium/VMWare) don't check for NULL input.

---
  dlls/opengl32/tests/opengl.c |    3 ++-
  1 file changed, 2 insertions(+), 1 deletion(-)

diff --git a/dlls/opengl32/tests/opengl.c b/dlls/opengl32/tests/opengl.c
index 8e3d729..4f799d2 100644
--- a/dlls/opengl32/tests/opengl.c
+++ b/dlls/opengl32/tests/opengl.c
@@ -197,7 +197,8 @@ static void test_pbuffers(HDC hdc)
      if(iPixelFormat != 0)
      {
          HDC pbuffer_hdc;
-        HPBUFFERARB pbuffer = pwglCreatePbufferARB(hdc, iPixelFormat, 
640 /* width */, 480 /* height */, NULL);
+        int attrib = 0;
+        HPBUFFERARB pbuffer = pwglCreatePbufferARB(hdc, iPixelFormat, 
640 /* width */, 480 /* height */, &attrib);
          if(!pbuffer)
              skip("Pbuffer creation failed!\n");
  -- 1.7.10.4