cam: fix use of uninitialized field

Initialize last_ to 0 to avoid uninitialized use.

Signed-off-by: Tomi Valkeinen <tomi.valkeinen@iki.fi>
Reviewed-by: Kieran Bingham <kieran.bingham@ideasonboard.com>
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Reviewed-by: Niklas Söderlund <niklas.soderlund@ragnatech.se>
Signed-off-by: Kieran Bingham <kieran.bingham@ideasonboard.com>

src/cam/capture.cpp

@@ -17,7 +17,7 @@ using namespace libcamera;
 
 Capture::Capture(std::shared_ptr<Camera> camera, CameraConfiguration *config,
 		 EventLoop *loop)
-	: camera_(camera), config_(config), writer_(nullptr), loop_(loop),
+	: camera_(camera), config_(config), writer_(nullptr), last_(0), loop_(loop),
 	  captureCount_(0), captureLimit_(0)
 {
 }