Ensure motion buffer is empty after construction

src/capture_motion.cpp

@@ -41,7 +41,7 @@ CaptureMotion::CaptureMotion(const TimeStamp& _ts,
                 buffer_(_data.size(), _delta_size, _delta_cov_size, computeCalibSize()),
                 origin_frame_ptr_(_origin_frame_ptr)
 {
-    // TODO put something in the buffer to start!
+    //
 }
 
 

src/motion_buffer.cpp

@@ -73,6 +73,7 @@ MotionBuffer::MotionBuffer(Size _data_size,
         calib_size_(_calib_size),
         calib_preint_(_calib_size)
 {
+    container_.clear();
 }
 
 const Motion& MotionBuffer::getMotion(const TimeStamp& _ts) const