fixed a precaution check in the cookie code, pointed out by Julien Chaffraix

RELEASE-NOTES

@@ -48,6 +48,6 @@ advice from friends like these:
  Marco Maggi, Camille Moncelier, Claes Jakobsson, Kevin Baughman,
  Marc Kleine-Budde, Jad Chamcham, Bjorn Augustsson, David Byron,
  Markus Koetter, Chad Monroe, Martin Storsjo, Siegfried Gyuricsko,
- Jon Nelson,
+ Jon Nelson, Julien Chaffraix
 
         Thanks! (and sorry if I forgot to mention someone)

lib/cookie.c

@@ -909,7 +909,7 @@ void Curl_cookie_clearsess(struct CookieInfo *cookies)
 {
   struct Cookie *first, *curr, *next, *prev = NULL;
 
-  if(!cookies->cookies || !cookies->cookies)
+  if(!cookies || !cookies->cookies)
     return;
 
   first = curr = prev = cookies->cookies;