Sanity check an ASN1_object_size result
Sanity check an ASN1_object_size result

If it's negative don't try and malloc it.

Reviewed-by: Tim Hudson <eb0be8e447f673b41b10eda09d63cd72526b0a42@openssl.org>

openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl,openssl/openssl