aio: don't leak memory

CID 161664 (#1 of 1): Resource leak (RESOURCE_LEAK)
11. leaked_storage: Variable re going out of scope leaks the storage it points to.

Signed-off-by: Andrew Vagin <avagin@virtuozzo.com>
Signed-off-by: Pavel Emelyanov <xemul@virtuozzo.com>