[S] Change in coreboot[master]: UPSTREAM: cbfstool: Fix possible memory leak

[Yu-Ping Wu (Code Review)]

Attention is currently required from: V Sowmya, Shahina Shaik, Haribalaraman Ramasubramanian, Sridhar Siricilla, Balaji Manigandan.

Yu-Ping Wu has posted comments on this change. ( https://review.coreboot.org/c/coreboot/+/69220 )

Change subject: UPSTREAM: cbfstool: Fix possible memory leak
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Patch Set 4:

(3 comments)

Commit Message:

https://review.coreboot.org/c/coreboot/+/69220/comment/2ac60dff_93bcf5ed 
PS4, Line 7: UPSTREAM
Please remove the `UPSTREAM` prefix.

File util/cbfstool/cbfstool.c:

https://review.coreboot.org/c/coreboot/+/69220/comment/0de46e2c_ac923f1b 
PS4, Line 773: header_offset
Take the chance to fix the indent (by aligning with `&image`)?

File util/cbfstool/common.c:

https://review.coreboot.org/c/coreboot/+/69220/comment/3cddb9d1_37586662 
PS4, Line 40: 		}
Not related to your change, but I think writing `return -1` here is more straightforward