lt bug fixes

libtorrent/include/libtorrent/bandwidth_manager.hpp

@@ -111,7 +111,7 @@ struct bandwidth_limit
 
 	void assign(int amount) throw()
 	{
-		TORRENT_ASSERT(amount > 0);
+		TORRENT_ASSERT(amount >= 0);
 		m_current_rate += amount;
 		m_quota_left += amount;
 	}

libtorrent/src/http_connection.cpp

@@ -284,7 +284,17 @@ void http_connection::on_read(asio::error_code const& e
 	{
 		libtorrent::buffer::const_interval rcv_buf(&m_recvbuffer[0]
 			, &m_recvbuffer[0] + m_read_pos);
-		m_parser.incoming(rcv_buf);
+		try
+		{
+			m_parser.incoming(rcv_buf);
+		}
+		catch (std::exception& e)
+		{
+			m_timer.cancel();
+			m_handler(asio::error::fault, m_parser, 0, 0);
+			m_handler.clear();
+			return;
+		}
 		if (!m_bottled && m_parser.header_finished())
 		{
 			if (m_read_pos > m_parser.body_start())

libtorrent/src/http_tracker_connection.cpp

@@ -217,7 +217,11 @@ namespace libtorrent
 					char dummy;
 					std::string bytes;
 					size_type range_start, range_end;
-					range_str >> bytes >> range_start >> dummy >> range_end;
+					// apparently some web servers do not send the "bytes"
+					// in their content-range
+					if (value.find(' ') != std::string::npos)
+						range_str >> bytes;
+					range_str >> range_start >> dummy >> range_end;
 					if (!range_str || range_end < range_start)
 					{
 						throw std::runtime_error("invalid content-range in HTTP response: " + range_str.str());