[syslinux] isolinux problems with more than a bunch of files in the iso root

[Sven-Haegar Koch]

hallo,

it seems isolinux.bin has a lockup problem if there are more than a 
handfull of files in the rootdirectory of the .iso image.
(I found it with a self-created install dvd with 530 packages in the 
rootdir)

The old version 3.31 shipped with Debian Etch was ok, the newer version
3.71 now shipped with Debian Lenny, and also the current git snapshot
18734bb0 are broken.

Test images:
Iso-Image working: http://test.sdinet.de/isolinux/debian-etch-3.31.iso
Iso-Image broken: http://test.sdinet.de/isolinux/debian-lenny-3.71.iso
Iso-Image broken: http://test.sdinet.de/isolinux/git-18734bb0.iso

These images were created with the script available at
http://test.sdinet.de/isolinux/create_testiso and just use dmitest.c32
as the single target - as the problem happens very early the used target
does not matter, I just chose something simple here.
(Created using the same genisoimage 1.1.9 for building all of them)

Screenshot (done with VMWare) for isolinux-git .iso with enabled debug 
messages and debug tracers:
http://test.sdinet.de/isolinux/git-18734bb0.png

All three isolinux.bin versions are working correctly without (in my 
testcase) the 1000 dummy files.

c'ya
sven

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