DBFIND_ENTRY

       Subroutine of DBFIND to perform an entry number search

       This is a subroutine of dbfind and is not a standalone procedure
       It performs a entry number search.

       dbfind_entry, type, svals, nentries, values, [COUNT = ]

       type - type of search (output from dbfparse)
       svals - search values (output from dbfparse)
       values - array of values to search

       good - indices of good values

       Count - integer scalar giving the number of valid matches
 SIDE EFFECTS"
       The obsolete system variable !err is set to number of good values

       D. Lindler  July,1987
       Fixed test for final entry number  W. Landsman    Sept. 95
       Converted to IDL V5.0   W. Landsman   September 1997
       Added COUNT keyword, deprecate !ERR  W. Landsman   March 2000
       Better checking of out of range values  W. Landsman February 2002

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