RFR: 8314481: JDWPTRANSPORT_ERROR_INTERNAL code in socketTransport.c can never be executed [v2]

[Chris Plummer]

> [JDK-8250630](https://bugs.openjdk.org/browse/JDK-8250630) introduced the following change:
> 
> 
>      if (listenAddr == NULL) {
> +        // No address of preferred addres family found, grab the fist one.
> +        listenAddr = &(addrInfo[0]);
> +    }
> +
> +    if (listenAddr == NULL) {
>          dbgsysFreeAddrInfo(addrInfo);
>          RETURN_ERROR(JDWPTRANSPORT_ERROR_INTERNAL, "listen failed: wrong address");
>      }
> 
> 
> After this change it is no longer possible for the RETURN_ERROR block to ever be executed because listenAddr can not ever still be NULL. The entire block should be removed.

Chris Plummer has updated the pull request incrementally with one additional commit since the last revision:

  fix comment typo

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15330/files
  - new: https://git.openjdk.org/jdk/pull/15330/files/1b2f5157..0421dbe2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15330&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15330&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/15330.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15330/head:pull/15330

PR: https://git.openjdk.org/jdk/pull/15330