databases/cego: update 2.39.11 -> 2.39.12

• Patch in CegoClient to catch format exceptions like "Invalid datetime string <0> for format <%d.%m.%Y %H:%M:%S>" This may happen, if on server side bad union selects are defined like create view v1 as select a as a, b as b from t1 union all select a as a, 0 as b from t2; where b is a datetime data type. In this case, invalid formatted strings occur on the client side, which are catched now.
• Patch in CegoDatabaseManager::useObject to support lock delay values > 1 sec. The DBM_LOCKDELAY value in CegoDefs has now increased to 2500 msec. In some cases for heavy updates ( e.g. clob updates ) this might be useful to avoid ugly exclusive lock delay messages in database log file
• Fix in CegoTableManager::updateTuple. If the update fails ( this might happen, if another transaction actually updates the corresponding tuple ), any allocated lob values are freed now. Otherwise the data pages for the lob values were allocated with no more references.

Submitted by: Bjoern Lemke <lemke@lemke-it.com>