opengl32: Don't fail with both PFD_DOUBLEBUFFER_DONTCARE and PFD_STEREO_DONTCARE.

dlls/opengl32/tests/opengl.c

@@ -277,7 +277,7 @@ static void test_choosepixelformat(void)
     pfd.dwFlags |= PFD_DOUBLEBUFFER_DONTCARE;
     ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE failed\n" );
     pfd.dwFlags |= PFD_STEREO_DONTCARE;
-    todo_wine ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE|PFD_STEREO_DONTCARE failed\n" );
+    ok( test_pfd(&pfd), "PFD_DOUBLEBUFFER_DONTCARE|PFD_STEREO_DONTCARE failed\n" );
     pfd.dwFlags &= ~PFD_DOUBLEBUFFER_DONTCARE;
     ok( test_pfd(&pfd), "PFD_STEREO_DONTCARE failed\n" );
     pfd.dwFlags &= ~PFD_STEREO_DONTCARE;

dlls/opengl32/wgl.c

@@ -517,6 +517,8 @@ INT WINAPI wglChoosePixelFormat(HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd)
 
             if (bestDBuffer != -1 && (format.dwFlags & PFD_DOUBLEBUFFER) != bestDBuffer) continue;
         }
+        else if (!best_format)
+            goto found;
 
         /* Stereo, see the comments above. */
         if (!(ppfd->dwFlags & PFD_STEREO_DONTCARE))
@@ -527,6 +529,8 @@ INT WINAPI wglChoosePixelFormat(HDC hdc, const PIXELFORMATDESCRIPTOR* ppfd)
 
             if (bestStereo != -1 && (format.dwFlags & PFD_STEREO) != bestStereo) continue;
         }
+        else if (!best_format)
+            goto found;
 
         /* Below we will do a number of checks to select the 'best' pixelformat.
          * We assume the precedence cColorBits > cAlphaBits > cDepthBits > cStencilBits -> cAuxBuffers.