LP #1678838: compilation error: format '%s' expects argument of type 'char*'

**Reported in Launchpad by Vasily Nemkov last update 10-11-2017 08:15:11

http://jenkins.percona.com/view/PXB%202.3/job/percona-xtrabackup-2.4-param/152/BUILD_TYPE=debug,Host=ubuntu-xenial-64bit,xtrabackuptarget=innodb55/console

07:03:52 /mnt/workspace/percona-xtrabackup-2.4-param/BUILD_TYPE/debug/Host/ubuntu-xenial-64bit/xtrabackuptarget/innodb55/storage/innobase/xtrabackup/src/xtrabackup.cc: In function void xtrabackup_prepare_func():
07:03:52 /mnt/workspace/percona-xtrabackup-2.4-param/BUILD_TYPE/debug/Host/ubuntu-xenial-64bit/xtrabackuptarget/innodb55/storage/innobase/xtrabackup/src/xtrabackup.cc:7562:20: error: format %s expects argument of type char*, but argument 2 has type table_name_t [-Werror=format=]
07:03:52 table->name);
07:03:52 ^

Was introduced by merging fix of bug 1089681 from 2.3