Propagate errors unchanged. Free allocated working area in the error return path. Remove duplicated cleanup code by rewriting the logic. As a side-effect, fixes a scan-build warning. Change-Id: I80e3c0015be672778f916e998c8c2e4f23d7588c Signed-off-by: Andreas Fritiofson <andreas.fritiofson@gmail.com> Reviewed-on: http://openocd.zylin.com/117 Tested-by: jenkins Reviewed-by: Øyvind Harboe <oyvindharboe@gmail.com>