Merge mysql.com:/home/alexi/mysql-4.1-bug1

into  mysql.com:/home/alexi/mysql-5.0

sql/item_strfunc.cc

@@ -2163,6 +2163,9 @@ void Item_func_lpad::fix_length_and_dec()
   {
     ulonglong length= ((ulonglong) args[1]->val_int() *
                        collation.collation->mbmaxlen);
+    /*a comment before (merged) */
+    length= max((ulonglong)args[0]->max_length, length);
+    /*a comment after */
     if (length >= MAX_BLOB_WIDTH)
     {
       length= MAX_BLOB_WIDTH;