Findings:
- 32 int shifted by an amount not in range -31..31:
The shifts by 32 bits don't actually have any effect on the value
(as shown by the tests)
- possible null pointer dereference
- repeated conditional test
- field only ever set to null
All other uses of the field were to check if it was null,
which it was, so it was removed
Other actions:
- Upgrade jUnit to version 4
- Add PowerMock dependency
Signed-off-by: Hugo Trippaers <htrippaers@schubergphilis.com>