Added destructor for controller

src/turboPmacController.cpp

@@ -179,6 +179,8 @@ turboPmacController::turboPmacController(const char *portName,
     }
 }
 
+turboPmacController::~turboPmacController(void) {}
+
 /*
 Access one of the axes of the controller via the axis adress stored in asynUser.
 If the axis does not exist or is not a Axis, a nullptr is returned and an

src/turboPmacController.h

@@ -36,6 +36,13 @@ class turboPmacController : public sinqController {
                         double idlePollPeriod, double comTimeout,
                         int numExtraParams = 0);
 
+    /**
+     * @brief Destroy the controller. Its implementation is empty, however the
+     * destructor needs to be provided for handling turboPmacControllerImpl.
+     *
+     */
+    ~turboPmacController(void) {}
+
     /**
      * @brief Get the axis object
      *