[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, Alexander Goncharov, Nikolai Artemiev.

Hello Aarya, Anastasia Klimchuk, Nikolai Artemiev, build bot (Jenkins),

I'd like you to reexamine a change. Please visit

https://review.coreboot.org/c/flashrom/+/81548?usp=email

to look at the new patch set (#3).

The following approvals got outdated and were removed:
Verified+1 by build bot (Jenkins)

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

memcpy() function expects 2nd parameter to be non-null. Make sure that
the pointer is non-null before passing it to the function.

Also move allocations under if conditions to avoid allocating memory for
a potentially 0 size.

Found-by: scan-build, clang v17.0.6
Signed-off-by: Alexander Goncharov 
Change-Id: I99aad4119f9c11bea75e3419926cc833bc1f68c5
---
M erasure_layout.c
1 file changed, 30 insertions(+), 24 deletions(-)

git pull ssh://review.coreboot.org:29418/flashrom refs/changes/48/81548/3