Conditional jump or move depends on uninitialised value in ha_handler_stats::has_stats

==11329== Thread 10:

==11329== Conditional jump or move depends on uninitialised value(s)

==11329==    at 0xFA06FE: ha_handler_stats::has_stats() (ha_handler_stats.h:58)

==11329==    by 0xF86200: MYSQL_QUERY_LOG::write(THD*, long, char const*, unsigned long, unsigned long long, unsigned long long, bool, char const*, unsigned long) (log.cc:3273)

==11329==    by 0xF7F944: Log_to_file_event_handler::log_slow(THD*, my_hrtime_t, char const*, unsigned long, unsigned long long, unsigned long long, bool, char const*, unsigned long) (log.cc:1076)

==11329==    by 0xF80615: LOGGER::slow_log_print(THD*, char const*, unsigned long, unsigned long long) (log.cc:1350)

==11329==    by 0xF91F6B: slow_log_print(THD*, char const*, unsigned int, unsigned long long) (log.cc:6950)

==11329==    by 0xA84E94: log_slow_statement(THD*) (sql_parse.cc:2585)

==11329==    by 0xA848B0: dispatch_command(enum_server_command, THD*, char*, unsigned int, bool) (sql_parse.cc:2453)

set long_query_time=0.0, log_slow_verbosity='engine';