Fix "Bug#40360 Binlog related errors with binlog off" in InnoDB code in order
to have a Bug#40360-free InnoDB Plugin 1.0.2.

The fix does check whether binary logging is enabled in MySQL by accessing the
opt_bin_log global variable that is defined in sql/mysqld.cc.

In case MySQL does develop another solution to this via Bug#40360 then we can
revert this patch (except the mysql-tests).

The windows-plugin part of this fix will be committed as a separate commit to
ease eventual merge into branches/5.1 [note from the future: the separate
commit went into r2936].

Approved by:	Marko (https://svn.innodb.com/rb/r/39)