Ref T397, checks on vector to find root cause NaN/inf issue

* sometimes very large numbers (xxE38) in vector
* sometimes vectors which look correct, but exceed [-1,1]

src/blackmisc/simulation/interpolatorspline.h

@@ -76,7 +76,7 @@ namespace BlackMisc
                 void setTimes(qint64 currentTimeMs, double timeFraction, qint64 interpolatedTimeMs);
 
             private:
-                PosArray m_pa; //! current positions array, latest values last
+                PosArray m_pa; //!< current positions array, latest values last
                 PhysicalQuantities::CLengthUnit m_altitudeUnit;
                 qint64 m_currentTimeMsSinceEpoc { -1 };
             };