su: suppress "warning: unused variable 'user_buf'"

Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>

1 files changed, 2 insertions, 0 deletions

diff --git a/loginutils/su.c b/loginutils/su.c
index 5bec4bc8b..c31e7e771 100644
--- a/loginutils/su.c
+++ b/loginutils/su.c
@@ -42,7 +42,9 @@ int su_main(int argc UNUSED_PARAM, char **argv)
         struct passwd *pw;
         uid_t cur_uid = getuid();
         const char *tty;
+#if ENABLE_FEATURE_UTMP
         char user_buf[64];
+#endif
         const char *old_user;
 
         flags = getopt32(argv, "mplc:s:", &opt_command, &opt_shell);