databases/cego: update 2.31.2 -> 2.31.3

• Fixed a file handle leak for datafiles and logfiles ( CegoFileHandler, CegoTableManager and CegoLogManager ) After tableset creation ( or start and stop ), file handles have not cleaned up properly. This lead to file remove problems in case of a tableset drop. This effect was detected by building and testing the MinGW64 port

Submitted by: lemke@lemke-it.com