FXFINDEND

       Find the end of a FITS file.

       This routine finds the end of the last logical record in a FITS file,
       which may be different from that of the physical end of the file.  Each
       FITS header is read in and parsed, and the file pointer is moved to
       where the next FITS extension header would be if there is one, or to
       the end of the file if not.

       FXFINDEND, UNIT [, EXTENSION]

       UNIT    = Logical unit number for the opened file.

       None.

       None.

       EXTENSION = The extension number that a new extension would
                   have if placed at the end of the file.

       None.

       FXHREAD, FXPAR

       None.

       The file must have been opened for block I/O.  There must not be any
       FITS "special records" at the end of the file.

       None.

       Data Handling, I/O, FITS, Generic.

       William Thompson, Feb. 1992.

       William Thompson, GSFC, February 1992.

       Version 1, William Thompson, GSFC, 12 April 1993.
               Incorporated into CDS library.

       Version 1, 12 April 1993.
       Converted to IDL V5.0   W. Landsman   September 1997
       Added EXTENSION parameter, CM 1999 Nov 18

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