Initialize Ualpha and Ubeta

Author: Candas1

src/StepperMotor.h

@@ -73,8 +73,6 @@ class StepperMotor: public FOCMotor
      */
     void move(float target = NOT_SET) override;
 
-    float	Ualpha,Ubeta; //!< Phase voltages U alpha and U beta used for inverse Park and Clarke transform
-
   /**
     * Method using FOC to set Uq to the motor at the optimal angle
     * Heart of the FOC algorithm

src/common/base_classes/FOCMotor.cpp

@@ -32,6 +32,10 @@ FOCMotor::FOCMotor()
 
   // voltage bemf 
   voltage_bemf = 0;
+
+  // Initialize phase voltages U alpha and U beta used for inverse Park and Clarke transform
+  Ualpha = 0;
+  Ubeta = 0;
 
   //monitor_port 
   monitor_port = nullptr;