navigator: bugfixing (WIP: mission topic not copying)

src/modules/navigator/rtl.cpp

@@ -57,9 +57,7 @@ RTL::RTL(Navigator *navigator) :
 	_rtl_state(RTL_STATE_NONE),
 	_home_position({}),
 	_loiter_radius(50),
-	_acceptance_radius(50),
-	_param_return_alt(this, "RETURN_ALT"),
-	_param_descend_alt(this, "DESCEND_ALT"),
+	_acceptance_radius(50)
 	_param_land_delay(this, "LAND_DELAY")
 {
 	/* load initial params */