fixed unused variable warnings

include/libtorrent/extensions.hpp

@@ -335,7 +335,7 @@ namespace libtorrent
 		virtual void add_handshake(entry&) {}
 		
 		// called when the peer is being disconnected.
-		virtual void on_disconnect(error_code const& ec) {}
+		virtual void on_disconnect(error_code const& /*ec*/) {}
 
 		// called when the peer is successfully connected. Note that
 		// incoming connections will have been connected by the time
@@ -383,7 +383,7 @@ namespace libtorrent
 
 		// called when libtorrent think this peer should be disconnected.
 		// if the plugin returns false, the peer will not be disconnected.
-		virtual bool can_disconnect(error_code const& ec) { return true; }
+		virtual bool can_disconnect(error_code const& /*ec*/) { return true; }
 
 		// called when an extended message is received. If returning true,
 		// the message is not processed by any other plugin and if false

include/libtorrent/intrusive_ptr_base.hpp

@@ -47,9 +47,6 @@ namespace libtorrent
 		intrusive_ptr_base(intrusive_ptr_base<T> const&)
 			: m_refs(0) {}
 
-		intrusive_ptr_base& operator=(intrusive_ptr_base const& rhs)
-		{ return *this; }
-
 		friend void intrusive_ptr_add_ref(intrusive_ptr_base<T> const* s)
 		{
 			TORRENT_ASSERT(s != 0);

include/libtorrent/storage.hpp

@@ -486,7 +486,7 @@ namespace libtorrent
 		bool release_files() { return false; }
 		bool delete_files() { return false; }
 		bool initialize(bool) { return false; }
-		int move_storage(std::string const&, int flags) { return 0; }
+		int move_storage(std::string const&, int) { return 0; }
 		int read(char*, int, int, int size) { return size; }
 		int write(char const*, int, int, int size) { return size; }
 		size_type physical_offset(int, int) { return 0; }