fix query cache in embedded

this fixes main.partition_cache and main.cache_innodb in --embed

followup for 430d60d1 MDEV-24487

libmysqld/embedded_priv.h

@@ -19,8 +19,8 @@
 
 C_MODE_START
 void lib_connection_phase(NET *net, int phase);
-void init_embedded_mysql(MYSQL *mysql, int client_flag);
-void *create_embedded_thd(int client_flag);
+void init_embedded_mysql(MYSQL *mysql, ulong client_flag);
+void *create_embedded_thd(ulong client_flag);
 int check_embedded_connection(MYSQL *mysql, const char *db);
 void free_old_query(MYSQL *mysql);
 extern MYSQL_METHODS embedded_methods;

libmysqld/lib_sql.cc

@@ -660,7 +660,7 @@ void end_embedded_server()
 }
 
 
-void init_embedded_mysql(MYSQL *mysql, int client_flag)
+void init_embedded_mysql(MYSQL *mysql, ulong client_flag)
 {
   THD *thd = (THD *)mysql->thd;
   thd->mysql= mysql;
@@ -680,7 +680,7 @@ void init_embedded_mysql(MYSQL *mysql, int client_flag)
   create_new_thread(), and prepare_new_connection_state().  This should
   be refactored to avoid code duplication.
 */
-void *create_embedded_thd(int client_flag)
+void *create_embedded_thd(ulong client_flag)
 {
   THD * thd= new THD(next_thread_id());