smb: Fixed unnecessary initialisation of struct member variables

There is no need to set the 'state' and 'result' member variables to
SMB_REQUESTING (0) and CURLE_OK (0) after the allocation via calloc()
as calloc() initialises the contents to zero.

lib/smb.c

@@ -234,9 +234,6 @@ static CURLcode smb_setup(struct connectdata *conn)
   if(!req)
     return CURLE_OUT_OF_MEMORY;
 
-  req->state = SMB_REQUESTING;
-  req->result = CURLE_OK;
-
   /* Parse the URL path */
   return smb_parse_url_path(conn);
 }