smack_cipso_apply() fails when applying multiple rules

A typo in f47b9c90 caused invalid buffer handling between output rules. This manifests itself when there are at least two rules and a rule with shorter subject comes first:

    # smackcipso <<END
    test1 250/2,3,4,6,10,11,14,16,18,19,20,23,24,26,27,28,30,35,36,40
    test12 250/2,3,4,6,10,11,14,16,18,19,20,23,24,26,27,28,30,35,36,40,43,44,47
    END
    Applying CIPSO failed.