wrong grid for LM external parameters for ERA5 – in #10: INT2LM

in #10: INT2LM

startlat_tot  = -16.99, startlon_tot  = -19.99,

may work

  @burkhardtrockel in #83c95d7

startlat_tot  = -16.99, startlon_tot  = -19.99,

may work

startlat_tot  = -16.99, startlon_tot  = -19.99,

may work