databases/cego: update 2.39.4 -> 2.39.5

• Bug fix in CegoAction::reallocateStringBuf, in the memcpy call, just the previous stringBufLen has to be copied ( _stringBufLen - MAXSTRINGLEN ). This bug might lead to seg fault in case of large parser input ( e.g. clob strings )
• In CegoQuery for insert and insert-by-select case, allocated blob and clob data ( by CegoQueryHelper::prepareFieldValue ) is cleaned now if any exception occurs

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