Fix for 687010: incorrect annot flag value

Fix decimal value of "NoView" annotation flag in annotvisible logic.
Fixes bug #687010.

DETAILS:

On page 493 of the PDF 1.4 reference, NoView is specified as bit
position 6, which would seem to correspond to the old value of 64.
However, for some reason Adobe counts its bit positions starting at
1, so the actual numeric value is 2^(bit pos - 1), or 32.

Index: lib/pdf_draw.ps
===================================================================
RCS file: /cvs/ghostscript/gs/lib/pdf_draw.ps,v
retrieving revision 1.73
diff -C2 -r1.73 pdf_draw.ps
*** lib/pdf_draw.ps	23 Jul 2003 21:27:48 -0000	1.73
--- lib/pdf_draw.ps	21 Aug 2003 17:54:59 -0000
***************
*** 1178,1182 ****
    dup 2 and 0 eq  			% Check hidden flag
    exch dup 4 and 0 ne Printed and	% Check print flag
!   exch 64 and 0 eq Printed not and	% Check noview flag
    or					% Combine print and view
    and 					% Combine with 'hidden' flag test
--- 1178,1182 ----
    dup 2 and 0 eq  			% Check hidden flag
    exch dup 4 and 0 ne Printed and	% Check print flag
!   exch 32 and 0 eq Printed not and	% Check noview flag
    or					% Combine print and view
    and 					% Combine with 'hidden' flag test