[gnutls-devel] libtasn1 | Make use of const variant of asn1_node (!9)

[Development of GNU's TLS library]

Tim Rühsen commented on a discussion on lib/coding.c: https://gitlab.com/gnutls/libtasn1/merge_requests/9#note_190367268

>   *   length needed.
>   **/
>  int
> -asn1_der_coding (asn1_node element, const char *name, void *ider, int *len,
> +asn1_der_coding (asn1_node_const element, const char *name, void *ider, int *len,

That doesn't work out the way asn1_node is typedef'ed. Adding just a 'const' results *NOT* in 'const asn1_node_st *' (as wanted) but in 'asn1_node_st * const' which is semantically different. That's how C works, I couldn't work around it other than creating/typedefing 'asn1_node_const'.

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