If we enter the if(!zd) and set free to 1, we dereference zd in the exit
code.
Signed-off-by: NEric Sesterhenn <snakebyte@gmx.de>
Signed-off-by: NAndrew Morton <akpm@osdl.org>
Signed-off-by: NJohn W. Linville <linville@tuxdriver.com>