Wycheproof failing PKCS7 depadding test

[karel-m]

The wycheproof failing test:

        {
          "tcId" : 29,
          "comment" : "zero padding",
          "key" : "db4f3e5e3795cc09a073fa6a81e5a6bc",
          "iv" : "23468aa734f5f0f19827316ff168e94f",
          "msg" : "3031323334353637383941424344454647",
          "ct" : "fbcbdfdaaf17980be939c0b243266ecb1188ff22f6563f6173440547d1e0dfd8",
          "result" : "invalid",
          "flags" : [
            "BadPadding"
          ]
        },

After decryption the last block looks like this (hex):

47,00,00,00,00,00,00,00,00,00,00,00,00,00,00,00

Which is expected to fail when using LTC_PAD_PKCS7 depadding.