Changes to allow compilation of MakeCredential.c

BUG=none
TEST=compilation succeeds:
   cc -Wall -Werror -c -o /dev/null MakeCredential.c

Change-Id: I1b725271c9a33ca2c42f9a6ffb01c9d344fa5187
Signed-off-by: Vadim Bendebury <vbendeb@chromium.org>
Reviewed-on: https://chromium-review.googlesource.com/274203
Reviewed-by: Utkarsh Sanghi <usanghi@chromium.org>
diff --git a/MakeCredential.c b/MakeCredential.c
index 36ee5a1..bf6de6a 100644
--- a/MakeCredential.c
+++ b/MakeCredential.c
@@ -50,7 +50,7 @@
 
    // Make encrypt key and its associated secret structure.
    // Even though CrypeSecretEncrypt() may return
-   out->secret.t.size = sizeof(out->secret.t.secret);
+   out->secret.t.size = sizeof(out->secret.t.buffer);
    result = CryptSecretEncrypt(in->handle, "IDENTITY", &data, &out->secret);
    if(result != TPM_RC_SUCCESS)
        return result;