Error when using $vaarg/$vacount/$vasplat and similar in a macro without vaargs #2510.

test/test_suite/macros/macro_vaarg_no.c3

@@ -0,0 +1,14 @@
+import std;
+
+macro void example(String... x)
+{
+  $for var $i = 0; $i < $vacount; $i++: // #error: can only be used inside of a macro with untyped
+    io::printn($vaarg[$i]);
+  $endfor
+}
+
+fn void main()
+{
+	example();
+}
+