Merge pull request mishoo#200 from johnjbarton/01a83b461f541898cb4b2f…

…9ef033245c1a7ee18b

Small fix to slice() to make it more robust and less confusing.

lib/parse-js.js

@@ -1301,7 +1301,7 @@ function array_to_hash(a) {
 };
 
 function slice(a, start) {
-        return Array.prototype.slice.call(a, start == null ? 0 : start);
+        return Array.prototype.slice.call(a, start || 0);
 };
 
 function characters(str) {