In patch mysql-5.5:revno:3097.92.133, we made the gcc 4.6.1 compiler
to stop complaining about the fact that binlog_can_be_corrupted was
defined but not used. The fix consisted in checking the variable
and printing a warning message.

However, the fix caused a regression as a message was being printed
out when there was no corrupted binary log causing performance
problems and triggering users' suspicions when there was no need.

In BUG#13337202, we do not print any message and use the variable
in an "if" with an empty body to keep the compiler happy.