[PathKit] Add more correctness tests to gold

Bug: skia:8216
Change-Id: I549f59f165e01ef2e827cf389a5412c123314a90
Reviewed-on: https://skia-review.googlesource.com/147817
Reviewed-by: Stephan Altmueller <stephana@google.com>
diff --git a/experimental/pathkit/pathkit_wasm_bindings.cpp b/experimental/pathkit/pathkit_wasm_bindings.cpp
index 6efaf3c..c680db1 100644
--- a/experimental/pathkit/pathkit_wasm_bindings.cpp
+++ b/experimental/pathkit/pathkit_wasm_bindings.cpp
@@ -131,7 +131,7 @@
                 path.quadTo(x1, y1, x2, y2);
                 break;
             case CONIC:
-                CHECK_NUM_ARGS(6);
+                CHECK_NUM_ARGS(5);
                 x1 = cmds[i++], y1 = cmds[i++];
                 x2 = cmds[i++], y2 = cmds[i++];
                 x3 = cmds[i++]; // width