interpolation error near the ground ( procx,procy>1 and east/.../north_add_in>1 ) – in #10: INT2LM

in #10: INT2LM

<p> Thanks a lot for diving into the code B) <br/> I will check this within the next couple of days. </p>

  @burkhardtrockel in #67a0aff

<p> Thanks a lot for diving into the code B) <br/> I will check this within the next couple of days. </p>

Thanks a lot for diving into the code B)
I will check this within the next couple of days.