Decryption requires Base64

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Passing a WordArray as the ciphertext CryptoJS.AES.decrypt() quietly fails 
(generally I get a 0-sigByte result, but sometimes I get negative-sigByte 
results). It is required to re-encode the WordArray as Base64 (which I presume 
decrypt() will then decode back to a WordArray).

Original issue reported on code.google.com by [e-mail] on 11 Jan 2014 at 3:08