test/compiler-test.js: Add missing semicolon

Fixes the following JSHint error:

  ./test/compiler-test.js: line 420, col 47, Missing semicolon.

test/compiler-test.js

@@ -417,7 +417,7 @@ test("start rule", function() {
 
   /* Invalid rule name */
   raises(
-    function() { parser.parse("whatever", "c") },
+    function() { parser.parse("whatever", "c"); },
     function(e) {
       return e instanceof Error && e.message === "Invalid rule name: \"c\".";
     }