WL#5138, reverted some review fixes

sql/mysql_priv.h

@@ -86,9 +86,9 @@ typedef ulong nesting_map;  /* Used for flags of nesting constructs */
 typedef ulonglong nested_join_map;
 
 /* query_id */
-typedef uint64 query_id_t;
+typedef int64 query_id_t;
 extern query_id_t global_query_id;
-extern uint32 thread_running;
+extern int32 thread_running;
 extern my_atomic_rwlock_t global_query_id_lock;
 
 /* increment query_id and return it.  */

sql/mysqld.cc

@@ -532,7 +532,7 @@ uint delay_key_write_options, protocol_version;
 uint lower_case_table_names;
 uint tc_heuristic_recover= 0;
 uint volatile thread_count;
-uint32 thread_running;
+int32 thread_running;
 ulonglong thd_startup_options;
 ulong back_log, connect_timeout, concurrency, server_id;
 ulong table_cache_size, table_def_size;