flush cookies fix

cookie.patch

diff --git a/lib/cookie.c b/lib/cookie.c
index a58ce2b35..65cc11732 100644
--- a/lib/cookie.c
+++ b/lib/cookie.c
@@ -1539,13 +1539,16 @@ static int cookie_output(struct CookieInfo *c, const char *dumphere)
   char *format_ptr;
   unsigned int i;
   unsigned int j;
   struct Cookie **array;
 
+  if(!c)
+    /* no cookie engine alive */
+    return 0;
+
   /* at first, remove expired cookies */
-  if(c)
-    remove_expired(c);
+  remove_expired(c);
 
   if(!strcmp("-", dumphere)) {
     /* use stdout */
     out = stdout;
     use_stdout = TRUE;
@@ -1560,11 +1563,11 @@ static int cookie_output(struct CookieInfo *c, const char *dumphere)
   fputs("# Netscape HTTP Cookie File\n"
         "# https://curl.haxx.se/docs/http-cookies.html\n"
         "# This file was generated by libcurl! Edit at your own risk.\n\n",
         out);
 
-  if(c && c->numcookies) {
+  if(c->numcookies) {
     array = malloc(sizeof(struct Cookie *) * c->numcookies);
     if(!array) {
       if(!use_stdout)
         fclose(out);
       return 1;