MDEV-15176: comment fix "1 00:10:10" -> "24:10:10"

Applying #594 to bb-10.2-ext

Author: Alexander Barkov

sql/compat56.cc

@@ -47,7 +47,7 @@ longlong TIME_to_longlong_time_packed(const MYSQL_TIME *ltime)
 {
  DBUG_ASSERT(ltime->year == 0);
  DBUG_ASSERT(ltime->month == 0);
- // Mix days with hours: "1 00:10:10" -> "24:00:10"
+ // Mix days with hours: "1 00:10:10" -> "24:10:10"
  long hms= ((ltime->day * 24 + ltime->hour) << 12) |
  (ltime->minute << 6) | ltime->second;
  longlong tmp= MY_PACKED_TIME_MAKE(hms, ltime->second_part);