We don't ever call group_ensure() with a non-null group, and
libmeanwhile takes steps to ensure a group never has a NULL name,
so this can't happen. But this makes clang happier.
#ifndef TESTS_H
# define TESTS_H
#include"../purple.h"
#include<check.h>
/* define the test suites here */
/* remember to add the suite to the runner in check_libpurple.c */