ipc_ns: free allocated objects at the end

ipc_ns.c:464:3: warning: Memory is never released; potential leak of
memory pointed to by 'values'
                return;
                ^
1 warning generated.

Signed-off-by: Andrey Vagin <avagin@openvz.org>
Signed-off-by: Pavel Emelyanov <xemul@parallels.com>