[mdb-dev] Don't calling exit() from libmdb.so

[Nirgal <con...@ni...>]

Hi everyone

Debian packaging analysis is complaining about the fact that libmdb might call exit().

> N:    In the case of an error, the library should instead return an
> N:    appropriate error code to the calling program which can then determine
> N:    how to handle the error, including performing any required clean-up.

Does the attached patch looks ok for you?