Change in flashrom[master]: dummyflasher.c: Don't leak `emu_persistent_image`

[Angel Pons (Code Review)]

Attention is currently required from: Nico Huber, Arthur Heymans, Anastasia Klimchuk.
Angel Pons has posted comments on this change. ( https://review.coreboot.org/c/flashrom/+/54905 )

Change subject: dummyflasher.c: Don't leak `emu_persistent_image`
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Patch Set 1:

(1 comment)

File dummyflasher.c:

https://review.coreboot.org/c/flashrom/+/54905/comment/564cc727_142daf52 
PS1, Line 1026: free(data->emu_persistent_image);
> Is it ok to free something which is !(not) ?

Do you mean if it's okay to pass a null pointer to `free()`? Quoting the C standard, 7.20.3.2/2 from ISO-IEC 9899 [1]:
> If ptr is a null pointer, no action occurs.

So yes, it's a perfectly fine thing to do.

[1]: http://www.open-std.org/JTC1/SC22/wg14/www/docs/n1124.pdf