Although the leak is negligible, the clean heap on exit will ease valgrind testing. Change-Id: If43f02fe594c30ceb1bea3259ea3e098d4b2d239 Signed-off-by: Tomas Vanek <vanekt@fbl.cz> Reviewed-on: http://openocd.zylin.com/4408 Tested-by: jenkins Reviewed-by: Marc Schink <openocd-dev@marcschink.de>