Warnings from URI::escape (obsolete since ruby 1.9.2) and some instance variables not initialized fixed

lib/wpscan/modules/malwares.rb

@@ -26,7 +26,7 @@ module Malwares
 
   # return array of string (url of malwares found)
   def malwares(malwares_file_path = nil)
-    if @malwares.nil?
+    unless @malwares
       malwares_found = []
       malwares_file = Malwares.malwares_file(malwares_file_path)
       index_page_body = Browser.instance.get(@uri.to_s).body

lib/wpscan/wp_target.rb

@@ -38,6 +38,7 @@ class WpTarget
     @verbose        = options[:verbose]
     @wp_content_dir = options[:wp_content_dir]
     @wp_plugins_dir = options[:wp_plugins_dir]
+    @multisite      = nil
 
     Browser.instance(options.merge(:max_threads => options[:threads]))
   end

lib/wpscan/wpscan_options.rb

@@ -45,7 +45,9 @@ class WpscanOptions
   attr_accessor *ACCESSOR_OPTIONS
 
   def initialize
-
+    ACCESSOR_OPTIONS.each do |option|
+      instance_variable_set("@#{option}", nil)
+    end
   end
 
   def url=(url)