cNoise3DComposable: Fixed unitialized member variables.

Fixes CID 43665.
cEndGen: Fixed unitialized member variables.

Fixes CID 43671.
cWorld: Moved initialization into constructor.

Fixes CID 71781.
cChunk: Fixed missing initialization.

Fixes CID 72670.
FastNBT: Added a sanity check for number of list items.

Fixes CID 55812.
WSSAnvil: Added clamping to entity coords.

Fixes CID 72854.
MCADefrag: Added a sanity check for chunk size.

Fixes CID 66448.
ProtoProxy: Added a sanity check to metadata string lengths.

Fixes CID 66415.