ipa: raspberrypi: Add a constructor struct DeviceStatus

The constructor sets all fields to 0. This replaces the memset(0) and default
value initialisation usage in the agc and lux controllers respectively.

Signed-off-by: Naushir Patuck <naush@raspberrypi.com>
Reviewed-by: David Plowman <david.plowman@raspberrypi.com>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Jacopo Mondi <jacopo@jmondi.org>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>

src/ipa/raspberrypi/controller/device_status.h

@@ -14,6 +14,12 @@
  */
 
 struct DeviceStatus {
+	DeviceStatus()
+		: shutter_speed(std::chrono::seconds(0)), analogue_gain(0.0),
+		  lens_position(0.0), aperture(0.0), flash_intensity(0.0)
+	{
+	}
+
 	/* time shutter is open */
 	libcamera::utils::Duration shutter_speed;
 	double analogue_gain;