Missing memcpy in akv_pkey_rsa_sign

[markehack]

The spec says that the length needs to be set on the return, so the length check is superfluous and the copy is missing from the else which then returns whatever was in memory and not the signature

   Log(LogLevel_Debug, "Signed successfully signature.size=[%zu]\n", signatureText.size);

    if (*siglen == signatureText.size)
    {
        memcpy(sig, signatureText.memory, signatureText.size);
    }
    else
    {  
        Log(LogLevel_Debug, "size prob = %zu\n", signatureText.size);
        memcpy(sig, signatureText.memory, signatureText.size);               // The spec says copy and set the length.
        *siglen = signatureText.size;                              
    }