if `net` equals zero and `device` has allocated properly at the same time, memory leaks.
this patch fixes it.
eeze_disk: fix a potention memory leak
if allocation for disk fails, memory leaks
this patch fixes it
eeze_syspaty: fix a potention memory leak
if udev device get sysname fails, memory leaks.
this patch fixes the problem.
eeze walk: fix a memory leaking
there is a memory leak in a logic for walking along child-parent relation,
in case of device_get_sysattr_value failure.
this patch fixes the leak.