In this Article, unless a different meaning plainly is required:

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 (7) "property of another" includes property in which any person other than the actor has an interest which the actor is not privileged to infringe, regardless of the fact that the actor also has an interest in the property and regardless of the fact that the other person might be precluded from civil recovery because the property was used in an unlawful transaction or was subject to forfeiture as contraband.  Property in possession of the actor shall not be deemed property of another who has only a security interest therein, even if legal title is in the creditor pursuant to a conditional sales contract or other security agreement.