double precision function kget_track_mass(ktrk)
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*  Returns mass of KWFIT track. This is the mass used in the 4-momentum.
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*  Input Parameters:
*  ktrk           integer variable
*                 KWFIT track number
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*  Output Parameters:
*  None
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*  Return value   double precision
*                 Mass of particle
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*  Other routines:
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*  Notes:
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*  Author:   Paul R Avery      Created:  Mon Jul 28 06:12:33 EDT 1997
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*  Major revisions:
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