logical function kget_track_is_mass_fixed(ktrk)
*
* begin_doc
*
*  Returns TRUE if KWFIT track has a fixed mass, which will not be updated during
*  fits. For example, tracks fitted in a tracking chamber and gammas are
*  considered to have fixed mass.
*
*  Input Parameters:
*  ktrk           integer variable
*                 KWFIT track number
*
*  Output Parameters:
*  None
*
*  Return value   logical
*                 TRUE  ==> track has fixed mass
*                 FALSE ==> track has floating mass or error
*
*  Other routines:
*
*  Notes:
*
*  Author:   Paul R Avery      Created:  Mon Jul 28 06:12:33 EDT 1997
*
*  Major revisions:
*
*
* end_doc