If mem_ap_sel_write_atomic_u32 fails then tmp_buff may not be released. Detected by clang. Change-Id: I3d5416bd47d0eea61f61ec02ac5e43c82f114108 Signed-off-by: Spencer Oliver <spen@spen-soft.co.uk> Reviewed-on: http://openocd.zylin.com/1433 Tested-by: jenkins Reviewed-by: Andreas Fritiofson <andreas.fritiofson@gmail.com>tags/v0.8.0-rc1