AP_Motors: init fixes for frame_class, type and initialised_ok

Thanks to OXINARF for spotting these

libraries/AP_Motors/AP_MotorsMatrix.cpp

@@ -23,9 +23,13 @@
 
 extern const AP_HAL::HAL& hal;
 
-// Init
+// init
 void AP_MotorsMatrix::init(motor_frame_class frame_class, motor_frame_type frame_type)
 {
+    // record requested frame class and type
+    _last_frame_class = frame_class;
+    _last_frame_type = frame_type;
+
     // setup the motors
     setup_motors(frame_class, frame_type);
 

libraries/AP_Motors/AP_Motors_Class.cpp

@@ -43,6 +43,7 @@ AP_Motors::AP_Motors(uint16_t loop_rate, uint16_t speed_hz) :
     // init other flags
     _flags.armed = false;
     _flags.interlock = false;
+    _flags.initialised_ok = false;
 
     // setup throttle filtering
     _throttle_filter.set_cutoff_frequency(0.0f);