[FIXED] std::list asserted in cChunkMap::RemoveClientFromChunks()

[xoft]

What was the assert message? That's the most important diagnostic.

SendThreads should be eliminated now (rev 328+) since sending uses cSocketThreads now.

I think I remember fixing one place where the m_LoadedChunks list was accessed without proper locking, though I don't really recall where or when. It would explain a lot