Fixed check

Author: firefart

modules/exploits/multi/http/wikka_spam_exec.rb

@@ -90,7 +90,7 @@ def get_cookie
 
     # Get the cookie in this format:
     # 96522b217a86eca82f6d72ef88c4c7f4=pr5sfcofh5848vnc2sm912ean2; path=/wikka
-    if res and res.get_cookies
+    if res and !res.get_cookies.empty?
       cookie = res.get_cookies
     else
       fail_with(Failure::Unknown, "#{peer} - No cookie found, will not continue")