stephenmathieson/describe.h — pull request #4 by modocache (2014-03-18 16:50:48+00:00)
Title: Add null assertion macros.

Add null assertion macros `assert_null` and `assert_not_null`.

---

These could be used in [the tests for clibs/which](https://github.com/clibs/which/blob/f0b23d1b0eecc5d1647cdc9f704156b677954b28/test.c#L9).