Merge bk-internal.mysql.com:/home/bk/mysql-4.1/

into serg.mylan:/usr/home/serg/Abk/mysql-4.1

sql/item_strfunc.h

@@ -362,6 +362,7 @@ public:
   void fix_length_and_dec()
   {
     max_length= MAX_FIELD_NAME * system_charset_info->mbmaxlen;
+    maybe_null=1;
   }
   const char *func_name() const { return "database"; }
 };