This fixes builds on Fedora:
../src/nss-systemd/nss-systemd.c:105:18: error: zero as null pointer constant [-Werror=zero-as-null-pointer-constant]
105 | .mutex = PTHREAD_MUTEX_INITIALIZER,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../src/nss-systemd/nss-systemd.c:105:18: error: zero as null pointer constant [-Werror=zero-as-null-pointer-constant]
../src/nss-systemd/nss-systemd.c:109:18: error: zero as null pointer constant [-Werror=zero-as-null-pointer-constant]
109 | .mutex = PTHREAD_MUTEX_INITIALIZER,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../src/nss-systemd/nss-systemd.c:109:18: error: zero as null pointer constant [-Werror=zero-as-null-pointer-constant]
../src/nss-systemd/nss-systemd.c:113:18: error: zero as null pointer constant [-Werror=zero-as-null-pointer-constant]
113 | .mutex = PTHREAD_MUTEX_INITIALIZER,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../src/nss-systemd/nss-systemd.c:113:18: error: zero as null pointer constant [-Werror=zero-as-null-pointer-constant]
../src/nss-systemd/nss-systemd.c:117:18: error: zero as null pointer constant [-Werror=zero-as-null-pointer-constant]
117 | .mutex = PTHREAD_MUTEX_INITIALIZER,
| ^~~~~~~~~~~~~~~~~~~~~~~~~
../src/nss-systemd/nss-systemd.c:117:18: error: zero as null pointer constant [-Werror=zero-as-null-pointer-constant]
cc1: all warnings being treated as errors
Lennart Poettering
83a3018e20