[Coverity 1666223] Logically dead code in mmsh.c

The indicated dead code may have performed some action; that action will never occur.

In OpenConnection: Code can never be reached because of a logical contradiction (CWE-561)

530    vlc_tls_t *sock = vlc_tls_SocketOpenTCP( VLC_OBJECT(p_access),
531                                             srv->psz_host, srv->i_port );
      cond_notnull: Condition sock == NULL, taking false branch. Now the value of sock is not NULL.
532    if( sock == NULL )
533    {
534        free( stream->ptr );
535        return VLC_EGENERIC;
536    }
537
538    msg_Dbg( p_access, "sending request:\n%s", stream->ptr );
539
540    ssize_t val = vlc_tls_Write( sock, stream->ptr, stream->length );
541    free( stream->ptr );
542    if( val < (ssize_t)stream->length )
543    {
544        msg_Err( p_access, "failed to send request" );
545        vlc_tls_Close( sock );
546        stream = NULL;
547    }
548
549    p_sys->stream = sock;
      notnull: At condition sock != NULL, the value of sock cannot be NULL.
      dead_error_condition: The condition sock != NULL must be true.
     
CID 1666223: (#1 of 1): Logically dead code (DEADCODE)
dead_error_line: Execution cannot reach the expression -2147483648 inside this statement: return (sock != NULL) ? 0 :....
550    return (sock != NULL) ? VLC_SUCCESS : VLC_EGENERIC;
551}

In line 546 sock should be likely have been set to NULL based in 016e42bc