MDEV-16235 Server crashes in my_utf8_uni or in my_strtod_int upon

SELECT .. LIMIT 0 (new variant)

This is another attempt to fix the problem of mdev-14515.

sql/sql_select.cc

@@ -1147,7 +1147,6 @@ JOIN::optimize()
       {
         DBUG_PRINT("info", ("Zero limit"));
         zero_result_cause= "Zero limit";
-        conds= 0;
       }
       table_count= top_join_tab_count= 0;
       error= 0;