Do not remove errors from the OpenSSL error queue in toresult()

Do not remove errors from the OpenSSL error queue in toresult()

dst__openssl_toresult3() first calls toresult() and subsequently uses
ERR_get_error_line_data() in a loop.  Given this, it is a mistake to use
ERR_get_error() in toresult() because it causes the retrieved error to
be removed from the OpenSSL error queue, thus preventing it from being
retrieved by the subsequent ERR_get_error_line_data() calls.  Fix by
using ERR_peek_error() instead of ERR_get_error() in toresult().