[S] Change in flashrom[master]: layout: Check return values for strdup in register_include_arg

[Anastasia Klimchuk (Code Review)]

Attention is currently required from: Felix Singer, Edward O'Callaghan, Angel Pons.

Anastasia Klimchuk has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/70006 )

Change subject: layout: Check return values for strdup in register_include_arg
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Patch Set 3:

(2 comments)

Commit Message:

https://review.coreboot.org/c/flashrom/+/70006/comment/b4a9e04f_3de5b2c2 
PS2, Line 11:
> Explain the issues and the new code changes.

Done

File layout.c:

https://review.coreboot.org/c/flashrom/+/70006/comment/c801d890_332d18c9 
PS2, Line 139: || file == NULL
> Just rethinking.. […]

Yes I forgot that indeed file is optional parameter. Please have a look at my latest version, whether it covers what we want? I read all your comments carefully.