Revert "Fix segfault in ext/date since 957aa2"

This reverts commit b5e5098c50.

A proper fix from Derick is underway. I apologise for stepping on his toes ;)

ext/date/lib/parse_tz.c

@@ -89,8 +89,8 @@ static void read_header(const unsigned char **tzf, timelib_tzinfo *tz)
 static void skip_transistions_64bit(const unsigned char **tzf, timelib_tzinfo *tz)
 {
 	if (tz->timecnt) {
-		*tzf += (sizeof(int64_t) * (tz->timecnt));
-		*tzf += (sizeof(unsigned char) * (tz->timecnt));
+		*tzf += (sizeof(int64_t) * (tz->timecnt + 1));
+		*tzf += (sizeof(unsigned char) * (tz->timecnt + 1));
 	}
 }