makes sure a torrent doesn't have too many pieces than can be handled. Fixes #61

include/libtorrent/piece_picker.hpp

@@ -475,6 +475,10 @@ namespace libtorrent
 		// if this is set to true, it means update_pieces()
 		// has to be called before accessing m_pieces.
 		mutable bool m_dirty;
+	public:
+
+		enum { max_pieces = piece_pos::we_have_index - 1 };
+
 	};
 
 	inline int piece_picker::blocks_in_piece(int index) const

src/torrent.cpp

@@ -407,6 +407,13 @@ namespace libtorrent
 
 		m_block_size = (std::min)(m_block_size, m_torrent_file->piece_length());
 
+		if (m_torrent_file->num_pieces()
+			> piece_picker::max_pieces)
+		{
+			m_error = "too many pieces in torrent";
+			pause();
+		}
+
 		// the shared_from_this() will create an intentional
 		// cycle of ownership, se the hpp file for description.
 		m_owning_storage = new piece_manager(shared_from_this(), m_torrent_file