d3d9/tests: Allow a higher slop for test_updatetexture.

dlls/d3d9/tests/visual.c

@@ -19917,7 +19917,7 @@ static void test_updatetexture(void)
                 ok(SUCCEEDED(hr), "Failed to end scene, hr %#x.\n", hr);
 
                 color = getPixelColor(device, 320, 240);
-                ok (color_match(color, 0x007f7f00, 2) || broken(tests[i].broken)
+                ok (color_match(color, 0x007f7f00, 3) || broken(tests[i].broken)
                         || broken(color == 0x00adbeef), /* WARP device often just breaks down. */
                         "Got unexpected color 0x%08x, case %u, %u.\n", color, t, i);
             }