Change in flashrom[master]: helpers.c: Fix undefined behavior in strndup()

[Edward O'Callaghan (Code Review)]

Attention is currently required from: Xiang Wang, Stefan Reinauer.
Edward O'Callaghan has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/49741 )

Change subject: helpers.c: Fix undefined behavior in strndup()
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Patch Set 2: Code-Review+2

(1 comment)

Commit Message:

https://review.coreboot.org/c/flashrom/+/49741/comment/4b69cc63_bde38df3 
PS1, Line 7: helpers.c: optimize strndup
> really thankful

Thanks a bunch for the rewrite Angel, I couldn't understand the initial msg either and was going to come back with a comment on some questions. However your feedback was super constructive! Thanks Xiang Wang for all these patches!

What do you think about adding a unit-test for this kind of stuff?