Code review comment for lp:~paul-mccullagh/maria/maria-pbxt-rc3

This patch changes MariaDB code in one case:

File handler.cc, Line 1591

DBUG_ASSERT(total_ha_2pc == (ulong) opt_bin_log+1); // only InnoDB and binlog

This line has been commented out, because the assertions fails now that PBXT supports XA.

Although this assertion implies that not everything will work, I have not found any problem with the stability of MySQL due to the addition of PBXT XA.

PBXT XA can be disabled by setting pbxt_support_xa=0, it is enabled by default.