Jedec.c was missing error handling in a few cases

Fix. jedec.c error handling used double negation in too many places for
no good reason. Clean up.

Corresponding to flashrom svn r779.

Signed-off-by: Carl-Daniel Hailfinger <c-d.hailfinger.devel.2006@gmx.net>
Acked-by: Sean Nelson <audiohacked@gmail.com>
1 file changed