[M] Change in flashrom[main]: erasure_layout: don't copy region buffers if they're null/zero-size

[Alexander Goncharov (Code Review)]

Attention is currently required from: Aarya, Anastasia Klimchuk, Nikolai Artemiev.

Alexander Goncharov has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/81548?usp=email )

Change subject: erasure_layout: don't copy region buffers if they're null/zero-size
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Patch Set 3:

(3 comments)

Commit Message:

https://review.coreboot.org/c/flashrom/+/81548/comment/aefb12d7_ac828f6c :
PS2, Line 10: the pointer is null
> I think from the meaning of the patch, you meant to say […]

Exactly, just a typo! Thanks, done.

File erasure_layout.c:

https://review.coreboot.org/c/flashrom/+/81548/comment/b062f6ac_31ec29d9 :
PS2, Line 263: size_t old_start_len
> This can be const, but also […]

You're right. Done

https://review.coreboot.org/c/flashrom/+/81548/comment/bd303596_142f4d28 :
PS2, Line 264: size_t old_end_len
> And this can be const and `end_buf_len`

Done