fixup tests

Signed-off-by: tison <[email protected]>

Author: tisonkun

test/test_syslog.rs

@@ -1,12 +1,11 @@
+use nix::syslog::Priority;
+
 #[cfg(target_os = "macos")]
 #[test]
 fn test_syslog_hello_world() {
     use nix::syslog::{openlog, syslog, Facility, LogFlags, Severity};
 
-    openlog(
-        "test_syslog_hello_world",
-        LogFlags::LOG_PID,
-        Facility::LOG_USER,
-    );
-    syslog(Severity::LOG_ERR as libc::c_int, "Hello, nix!");
+    let name = "test_syslog_hello_world";
+    openlog(name, LogFlags::LOG_PID, Facility::LOG_USER).unwrap();
+    syslog(Priority::from_severity(Severity::LOG_EMERG), "Hello, nix!");
 }