nss-systemd: add work-around to silence gcc warning
In file included from ../src/basic/fs-util.h:32, from ../src/nss-systemd/nss-systemd.c:28: ../src/nss-systemd/nss-systemd.c: In function '_nss_systemd_getgrnam_r': ../src/nss-systemd/nss-systemd.c:416:32: warning: argument to 'sizeof' in 'memset' call is the same pointer type 'char *' as the destination; expected 'char' or an explicit length [-Wsizeof-pointer-memaccess] memzero(buffer, sizeof(char*)); ^~~~ ../src/basic/util.h:118:39: note: in definition of macro 'memzero' #define memzero(x,l) (memset((x), 0, (l))) ^ gcc is trying to be helpful, and it's not far from being right. It _looks_ like sizeof(char*) is an error, but in this case we're really leaving a space empty for a pointer, and our calculation is correct. Since this is a short file, let's just use simplest option and turn off the warning above the two functions that trigger it.
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@ -328,6 +328,8 @@ fail:
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return NSS_STATUS_UNAVAIL;
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}
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#pragma GCC diagnostic ignored "-Wsizeof-pointer-memaccess"
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enum nss_status _nss_systemd_getgrnam_r(
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const char *name,
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struct group *gr,
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