Declare the |j| variable before use in lib/utils/arrays.js

Until now it was inadvertently global.

lib/utils/arrays.js

@@ -3,7 +3,7 @@ var arrays = {
   range: function(start, stop) {
     var length = stop - start,
         result = new Array(length),
-        i;
+        i, j;
 
     for (i = 0, j = start; i < length; i++, j++) {
       result[i] = j;