updated piece_picker fix and added another invariant check to policy

examples/Jamfile

@@ -20,10 +20,8 @@ project client_test
    ;  
 
 exe client_test : client_test.cpp
-	: <boost>source:<library>/boost/program_options
-	<boost>source:<library>/boost/regex
-	<boost>system:<library>program-options
-	<boost>system:<library>regex
+	: <library>/boost/program_options
+	<library>/boost/regex
 	;
 
 exe simple_client : simple_client.cpp ;

src/policy.cpp

@@ -280,6 +280,7 @@ namespace libtorrent
 		{
 			if (p.is_requested(*i))
 			{
+				if (num_requests <= 0) break;
 				// don't request pieces we already have in our request queue
 				const std::deque<piece_block>& dq = c.download_queue();
 				const std::deque<piece_block>& rq = c.request_queue();
@@ -299,10 +300,9 @@ namespace libtorrent
 			assert(p.num_peers(*i) == 1);
 			assert(p.is_requested(*i));
 			num_requests--;
-			if (num_requests == 0) break;
 		}
 
-		if (busy_pieces.empty() || num_requests == 0)
+		if (busy_pieces.empty() || num_requests <= 0)
 		{
 			// in this case, we could not find any blocks
 			// that was free. If we couldn't find any busy
@@ -1405,6 +1405,11 @@ namespace libtorrent
 					, boost::bind(std::equal_to<peer_connection*>(), _1, p.connection))
 					!= conns.end());
 			}
+			if (p.optimistically_unchoked)
+			{
+				assert(p.connection);
+				assert(!p.connection->is_choked());
+			}
 			assert(p.connection->peer_info_struct() == 0
 				|| p.connection->peer_info_struct() == &p);
 			++nonempty_connections;

src/torrent_info.cpp

@@ -674,7 +674,7 @@ namespace libtorrent
 	{
 		assert(m_piece_length > 0);
 
-		if ((m_urls.empty() && m_nodes.empty()) || m_files.empty())
+		if (m_files.empty())
 		{
 			// TODO: throw something here
 			// throw

test/test_web_seed.cpp

@@ -2,9 +2,11 @@
 #include "libtorrent/hasher.hpp"
 #include "libtorrent/file_pool.hpp"
 #include "libtorrent/storage.hpp"
+#include "libtorrent/bencode.hpp"
 #include <boost/thread.hpp>
 #include <boost/tuple/tuple.hpp>
 #include <boost/filesystem/operations.hpp>
+#include <fstream>
 
 #include "test.hpp"
 #include "setup_transfer.hpp"
@@ -55,7 +57,11 @@ void test_transfer()
 	}
 	
 	// to calculate the info_hash
-	torrent_file.create_torrent();
+	entry te = torrent_file.create_torrent();
+
+	te.print(std::cout);
+//	std::ofstream torrent("web_seed.torrent", std::ios::binary | std::ios::trunc);
+//	bencode(std::ostream_iterator<char>(torrent), te);
 
 	session ses;
 	ses.set_severity_level(alert::debug);