silence coverity warnings

lib/dns/time.c

@@ -161,6 +161,14 @@ dns_time64_fromtext(const char *source, isc_int64_t *target) {
 	RANGE(1, 12, month);
 	RANGE(1, days[month - 1] +
 		 ((month == 2 && is_leap(year)) ? 1 : 0), day);
+#ifdef __COVERITY__
+	/*
+	 * Use a simplified range to silence Coverity warning (in
+	 * arithmetic with day below).
+	 */
+	RANGE(1, 31, day);
+#endif /* __COVERITY__ */
+
 	RANGE(0, 23, hour);
 	RANGE(0, 59, minute);
 	RANGE(0, 60, second);		/* 60 == leap second. */