libmysql.def, libmysql.c:

  Clean-ups

libmysql/libmysql.c

@@ -3170,7 +3170,7 @@ void my_net_local_init(NET *net)
   encoded string, not including the terminating null character.
 */
 
-unsigned long
+ulong STDCALL
 mysql_hex_string(char *to, const char *from, unsigned long length)
 {
   char *to0= to;

libmysql/libmysql.def

@@ -11,6 +11,7 @@ EXPORTS
 	mysql_errno
 	mysql_error
 	mysql_escape_string
+	mysql_hex_string
 	mysql_fetch_field
 	mysql_fetch_field_direct
 	mysql_fetch_fields