Simplify member(name, array) implementation.

lib/utils.js

@@ -59,10 +59,7 @@ function characters(str) {
 };
 
 function member(name, array) {
-    for (var i = array.length; --i >= 0;)
+    return array.indexOf(name) >= 0;
-        if (array[i] == name)
-            return true;
-    return false;
 };
 
 function find_if(func, array) {