syslogd: Minor, fix size_t format specifier %zd vs %zu

Signed-off-by: Joachim Nilsson <troglobit@gmail.com>

src/syslogd.c

@@ -1635,7 +1635,7 @@ static void fprintlog_successive(struct filed *f, int flags)
 	buffer.timestamp = f->f_lasttime;
 	buffer.flags = flags;
 
-	snprintf(msg, sizeof(msg), "last message buffered %zd times",
+	snprintf(msg, sizeof(msg), "last message buffered %zu times",
 		 f->f_prevcount);
 	buffer.msg = msg;