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* grub2: fix empty file handlingJeremy Kerr2014-06-051-0/+10
Currently, we have a bug when parsing zero-length files: we subtract one from the length to exclude the trailing NUL (added by read_file), but a zero-length file will result in a length of -1. This change adds an explicit exit if we're attempting to parse an empty file. Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
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