rgw: Initialize pointer field in seed

Fixes the Coverity Scan Report:
CID 1396116: Uninitialized pointer field (UNINIT_CTOR)
2. uninit_member: Non-static class member create_date is not initialized in this constructor nor in any functions that it calls.
4. uninit_member: Non-static class member s is not initialized in this constructor nor in any functions that it calls.
6. uninit_member: Non-static class member store is not initialized in this constructor nor in any functions that it calls.

Signed-off-by: Jos Collin <jcollin@redhat.com>

src/rgw/rgw_torrent.h

@@ -96,16 +96,16 @@ class seed
 
   string  announce;    // tracker
   string origin; // origin
-  time_t create_date;    // time of the file created
+  time_t create_date{0};    // time of the file created
   string comment;  // comment
   string create_by;    // app name and version
   string encoding;    // if encode use gbk rather than gtf-8 use this field
   uint64_t sha_len;  // sha1 length
   bool is_torrent;  // flag
   bufferlist bl;  // bufflist ready to send
 
-  struct req_state *s;
-  RGWRados *store;
+  struct req_state *s{nullptr};
+  RGWRados *store{nullptr};
   SHA1 h;
 
   TorrentBencode dencode;