Bugfix.
Squandering the allocated size in pool segment
- New pool segments are needed when existing ones are full
- In this case, the requested size was squandered in the start of the pool segment
- This was never a problem, with allocates below half the pool segment size
- AxeSMTP allocates larger blocks and ran into problems as a first
- Squandered memory in the beginning, remainder sticks out of the pool segment