add chan vars to param event during hangup hook

git-svn-id: http://svn.freeswitch.org/svn/freeswitch/trunk@10439 d0543943-73ff-0310-b7d9-9358b9ac24b2

src/switch_core_state_machine.c

@@ -412,6 +412,7 @@ SWITCH_DECLARE(void) switch_core_session_run(switch_core_session_t *session)
 							*arg++ = '\0';
 						}
 						SWITCH_STANDARD_STREAM(stream);
+						switch_channel_get_variables(session->channel, &stream.param_event);
 						switch_api_execute(cmd, arg, NULL, &stream);
 						switch_log_printf(SWITCH_CHANNEL_LOG, SWITCH_LOG_DEBUG, "Hangup Command %s(%s):\n%s\n", cmd, arg,
 										  switch_str_nil((char *) stream.data));