proper max_records estimation for sort-repair of fulltext indexes

mysql-test/t/ctype_utf8.test:
  bad merge fixed

myisam/mi_check.c

@@ -2037,7 +2037,7 @@ int mi_repair_by_sort(MI_CHECK *param, register MI_INFO *info,
       uint ft_max_word_len_for_sort=FT_MAX_WORD_LEN_FOR_SORT*
                                     sort_param.keyinfo->seg->charset->mbmaxlen;
       sort_info.max_records=
-        (ha_rows) (sort_info.filelength/ft_max_word_len_for_sort+1);
+        (ha_rows) (sort_info.filelength/ft_min_word_len+1);
 
       sort_param.key_read=sort_ft_key_read;
       sort_param.key_write=sort_ft_key_write;

mysql-test/r/fulltext.result

@@ -330,6 +330,9 @@ t1_id	name	t2_id	t1_id	name
 select * from t2 where match name against ('a* b* c* d* e* f*' in boolean mode);
 t2_id	t1_id	name
 drop table t1,t2;
+create table t1 (a text, fulltext key (a));
+insert into t1 select "xxxx yyyy zzzz";
+drop table t1;
 SET NAMES latin1;
 CREATE TABLE t1 (t text character set utf8 not null, fulltext(t));
 INSERT t1 VALUES ('Mit freundlichem Gr'), ('aus Osnabrck');

mysql-test/t/ctype_utf8.test

@@ -645,6 +645,7 @@ insert into t1 values(1,'foo'),(2,'foobar');
 select * from t1 where b like 'foob%';
 --disable_warnings
 alter table t1 engine=bdb;
+--enable_warnings
 select * from t1 where b like 'foob%';
 drop table t1;
 

mysql-test/t/fulltext.test

@@ -253,9 +253,16 @@ select * from t1 join t2 using(`t1_id`) where match (t1.name, t2.name) against('
 # bug with many short (< ft_min_word_len) words in boolean search
 #
 select * from t2 where match name against ('a* b* c* d* e* f*' in boolean mode);
-
 drop table t1,t2;
 
+#
+# bug with repair-by-sort and incorrect records estimation
+#
+
+create table t1 (a text, fulltext key (a));
+insert into t1 select "xxxx yyyy zzzz";
+drop table t1;
+
 #
 # UTF8
 #