BUG#13337202 - REPLICATION PERFORMANCE DROP DUE TO "THE BINLOG MAY BE CORRUPTED" FLOOD

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.

sql/sql_repl.cc

@@ -731,7 +731,15 @@ impossible position";
         /Alfranio
       */
       if (binlog_can_be_corrupted)
-         sql_print_information("The binlog may be corrupted.");
+      {
+        /*
+           Don't try to print out warning messages because this generates
+           erroneous messages in the error log and causes performance
+           problems.
+
+           /Alfranio
+        */
+      }
       
       pos = my_b_tell(&log);
       if (RUN_HOOK(binlog_transmit, before_send_event,