Fixed test 1300 to pass the memory torture test

tests/unit/unit1300.c

@@ -40,8 +40,10 @@ static CURLcode unit_setup(void)
   if(!llist)
     return CURLE_OUT_OF_MEMORY;
   llist_destination = Curl_llist_alloc(test_curl_llist_dtor);
-  if(!llist_destination)
+  if(!llist_destination) {
+      Curl_llist_destroy(llist, NULL);
       return CURLE_OUT_OF_MEMORY;
+  }
 
   return CURLE_OK;
 }