Persistence problem with the BlockBuffer

[CptCrispyCrunchy]

The BlockBufferComponent doesn't get correctly deserialized, although there are type handlers for every field in the BufferedBlock.class (made sure it is a MappedContainer, has a default constructor).
When trying to retrieve the stored information with the BlockBufferSystem I get a NPE as the list in the BlockBufferComponent is null.

[skaldarnar]

Fixed by 0ac10ac