merged logging fix from RC_0_16

ChangeLog

@@ -6,6 +6,7 @@
 	* fix uTP edge case where udp socket buffer fills up
 	* fix nagle implementation in uTP
 
+	* fixed verbose log error for NAT holepunching
 	* fix a bunch of typos in python bindings
 	* make get_settings available in the python binding regardless of deprecated functions
 	* fix typo in python settings binding

src/bt_peer_connection.cpp

@@ -1504,7 +1504,7 @@ namespace libtorrent
 				error_code ec;
 				char const* err_msg[] = {"no such peer", "not connected", "no support", "no self"};
 				peer_log("<== HOLEPUNCH [ msg:failed error: %d msg: %s ]", error
-					, ((error >= 0 && error < 4)?err_msg[error]:"unknown message id"));
+					, ((error > 0 && error < 5)?err_msg[error-1]:"unknown message id"));
 #endif
 				// #error deal with holepunch errors
 				(void)error;