RFR: JDK-8312512: sspi.cpp gss_export_name avoid delete on NULL fullname

[Daniel Jeliński]

On Mon, 24 Jul 2023 07:50:44 GMT, Matthias Baesken <mbaesken at openjdk.org> wrote:

> sspi.cpp contains the gss_export_name function, where at the end some cleanup is done by calling delete. However this should be done more careful, because the function get_full_name which is called in gss_export_name might return NULL, so we better avoid calling delete in this case.

`free`, `delete` and `delete[]` are all safe to call on a NULL pointer.

I noticed that we are checking for NULL in other places in this file; could you remove these checks?

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Changes requested by djelinski (Reviewer).

PR Review: https://git.openjdk.org/jdk/pull/14989#pullrequestreview-1543239479