subr. trplst - j.f.chandler - 1999 nov
derived from subr. evtrp
This is a routine for listing the interpolated coordinates for
debugging purposes.
input parameters:
jd      integer value of the coord. time of the desired pt
fract   fractional part of the coordinate time of the point
nvel =0 positions
1 velocities
-2 accelerations
lcntl   control integer used by caller
label   indicates which is the calling routine
x       coordinate array (pos+vel or acc)