added 'incoming' peer source

include/libtorrent/peer_info.hpp

@@ -72,7 +72,8 @@ namespace libtorrent
 			dht = 0x2,
 			pex = 0x4,
 			lsd = 0x8,
-			resume_data = 0x10
+			resume_data = 0x10,
+			incoming = 0x20
 		};
 
 		int source;

src/bt_peer_connection.cpp

@@ -1221,7 +1221,7 @@ namespace libtorrent
 			{
 				tcp::endpoint adr(remote().address()
 					, (unsigned short)listen_port->integer());
-				t->get_policy().peer_from_tracker(adr, pid(), 0, 0);
+				t->get_policy().peer_from_tracker(adr, pid(), peer_info::incoming, 0);
 			}
 		}
 		// there should be a version too

src/piece_picker.cpp

@@ -1229,6 +1229,7 @@ namespace libtorrent
 
 	bool piece_picker::can_pick(int piece, std::vector<bool> const& bitmask) const
 	{
+		assert(piece >= 0 && piece < int(m_piece_map.size()));
 		return bitmask[piece]
 			&& !m_piece_map[piece].have()
 			&& !m_piece_map[piece].downloading