sql/opt_split.cc:1043:5: warning: ‘best_param_tables’ may be used uninitialized

sql/opt_split.cc: In member function ‘SplM_plan_info* st_join_table::choose_best_splitting(uint, table_map, table_map*)’:

sql/opt_split.cc:1043:5: warning: ‘best_param_tables’ may be used uninitialized [-Wmaybe-uninitialized]

 1043 |     if (!best_param_tables)

      |     ^~

sql/opt_split.cc:966:13: note: ‘best_param_tables’ was declared here

  966 |   table_map best_param_tables;

      |             ^~~~~~~~~~~~~~~~~