[#2558] Check that @memberships is set before using it.

app/views/users/_memberships.rhtml

@@ -1,5 +1,5 @@
 <%# TODO: Override the default view until post 0.8.x which will have the hooks %>
-<% if @memberships.any? %>
+<% if @memberships && @memberships.any? %>
 <table class="list memberships">
 	<thead>
 	  <th><%= l(:label_project) %></th>

lib/rate_users_helper_patch.rb

@@ -1,4 +1,4 @@
-require_dependency 'users_helper'
+require 'users_helper'
 
 module RateUsersHelperPatch
   def self.included(base) # :nodoc: