Fix VC++ compiler error (function redifinition) for embedded server

libmysql/client_settings.h

@@ -42,7 +42,7 @@ my_bool handle_local_infile(MYSQL *mysql, const char *net_filename);
 
 void mysql_read_default_options(struct st_mysql_options *options,
 				const char *filename,const char *group);
-MYSQL *
+MYSQL * STDCALL
 cli_mysql_real_connect(MYSQL *mysql,const char *host, const char *user,
 		       const char *passwd, const char *db,
 		       uint port, const char *unix_socket,ulong client_flag);