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H A Dtadb.c595937135330dbeab489dfbf444cbd9c536667df Thu May 27 11:13:20 UTC 2021 Jens Wiklander <jens.wiklander@linaro.org> core: fix populate_files() coverity warning

In populate_files() db->files is checked to be not NULL leading but at
another place db->nbits is checked instead before accessing db->files.
Both checks are OK since db->files mustn't be NULL if db->nbits is
larger than 0.

This confuses coverity to emit a warning, so change the function to
check db->nbits instead.

This fixes coverity scan:
CID 1501793 (#1 of 1): Dereference after null check (FORWARD_NULL)

Acked-by: Jerome Forissier <jerome@forissier.org>
Signed-off-by: Jens Wiklander <jens.wiklander@linaro.org>