BUG#13545447: RPL_ROTATE_LOGS FAILS DUE TO CONCURRENCY ISSUES IN REP. CODE

Post-push fix, broken build:
sql/rpl_master.cc:1049:70: error: converting ‘false’ to pointer type ‘bool*’ [-Werror=conversion-null]

sql/log_event.h

@@ -972,7 +972,7 @@ class Log_event
   static int read_log_event(IO_CACHE* file, String* packet,
                             pthread_mutex_t* log_lock,
                             const char *log_file_name_arg= NULL,
-                            bool* is_binlog_active= false);
+                            bool* is_binlog_active= NULL);
   /*
     init_show_field_list() prepares the column names and types for the
     output of SHOW BINLOG EVENTS; it is used only by SHOW BINLOG