When parsing a string to numbers, we don't need to copy it. And when creating strings, we should eventually free them. Change-Id: I9023fef6e97a1830bc68502be32e79879c1617d4 Found-By: Coverity Scan Signed-off-by: Patrick Georgi <patrick@georgi-clan.de> Reviewed-on: http://review.coreboot.org/6484 Tested-by: build bot (Jenkins) Reviewed-by: Edward O'Callaghan <eocallaghan@alterapraxis.com>