Attitude fw yaw: Initialize yaw rate properly

attitude_fw/ecl_yaw_controller.cpp

@@ -50,6 +50,7 @@
 ECL_YawController::ECL_YawController() :
 	ECL_Controller("yaw"),
 	_coordinated_min_speed(1.0f),
+	_max_rate(0.0f), /* disable by default */
 	_coordinated_method(0)
 {
 }