AP_L1_Control: wrap_180_cd no longer solely returns floats

libraries/AP_L1_Control/AP_L1_Control.cpp

@@ -64,7 +64,7 @@ float AP_L1_Control::get_yaw()
 /*
   Wrap AHRS yaw sensor if in reverse - centi-degress
  */
-float AP_L1_Control::get_yaw_sensor()
+int32_t AP_L1_Control::get_yaw_sensor() const
 {
     if (_reverse) {
         return wrap_180_cd(18000 + _ahrs.yaw_sensor);

libraries/AP_L1_Control/AP_L1_Control.h

@@ -128,5 +128,5 @@ private:
 
     bool _reverse = false;
     float get_yaw();
-    float get_yaw_sensor();
+    int32_t get_yaw_sensor() const;
 };