Fixed a small hooks undefined problem.

lib/hooks.js

@@ -12,10 +12,10 @@ Hooks.runHooks = function() {
   }
   }
 
 
   if (!Array.isArray(hooks)) {
   if (!Array.isArray(hooks)) {
-    hooks = [hooks]
+    hooks = hooks === undefined ? [] : [hooks]
   }
   }
 
 
-  if (hooks === undefined || hooks.length < 1) {
+  if (hooks.length < 1) {
     return fn.apply(this, [null].concat(args))
     return fn.apply(this, [null].concat(args))
   }
   }