cras_hfp_slc: Fix double free issue

Fix double free issue by changing the order of checking rc and free
after calling parse_int().

BUG=oss-fuzz:66398
TEST=Unit tests

Change-Id: Ic8ceb4bcf406485ed23b9ac45fa529a8b523841f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/adhd/+/5267401
Tested-by: chromeos-cop-builder@chromeos-cop.iam.gserviceaccount.com <chromeos-cop-builder@chromeos-cop.iam.gserviceaccount.com>
Commit-Queue: Baili Deng <bailideng@google.com>
Tested-by: Baili Deng <bailideng@google.com>
Reviewed-by: Li-Yu Yu <aaronyu@google.com>
2 files changed