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20000719: GIF driver

Scott & Steve,

Some more tweaking of the GIF driver-

HSDATT.f has a call:

CALL HSCINT (lastbl, iret)


however, the number of args doesn't match HSCINT.f
        SUBROUTINE HSCINT  ( iret )

The lastbl parameter is never used, so I removed it from
the hsdatt.f call.

Also, the hsctbl.f from tamu which I uploaded to AS2 yesterday
has the line near the end:
           lastbl = coltbl

I commented this out:

C           lastbl = coltbl

Since lastbl is not of type char , its an error. Presumably,
lastbl was supposed to hold a unit number... but, thats
only a guess and I can see no reason for it.

Steve