[An extra null pointer check is not needed in functions](http://dietmar-kuehl.de/mirror/c++-faq/freestore-mgmt.html#faq-16.8) like the following. - [async_dumper_t](https://github.com/okws/okws/blob/f1b11e316b326ea83b3a02f32e5c7185472900d5/libahttp/aparse.h#L116) - [clist_t::deleteall](https://github.com/okws/okws/blob/c4901d19f28347d86dff890e73bdde7beeadafa2/libpub/clist.h#L49) - [sth_prepared_t](https://github.com/okws/okws/blob/8aceefacca5285c5018db1bda52764f8ddfe3c1b/libamysql/mystmt.C#L45)
An extra null pointer check is not needed in functions like the following.