Make sure all char columns in the mysql.* tables have the proper width in

mysql_fix_privilege_tables.sql, or they may get truncated during conversion
to utf8. (Bug #7539)       

scripts/mysql_fix_privilege_tables.sql

@@ -9,13 +9,38 @@
 -- this sql script.
 -- On windows you should do 'mysql --force mysql < mysql_fix_privilege_tables.sql'
 
-ALTER TABLE user type=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
-ALTER TABLE db type=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
-ALTER TABLE host type=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
-ALTER TABLE func type=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
-ALTER TABLE columns_priv type=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
-ALTER TABLE tables_priv type=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
-ALTER TABLE user change Password Password char(41) binary not null;
+-- Convert all tables to UTF-8 with binary collation
+-- and reset all char columns to correct width
+ALTER TABLE user
+  MODIFY Host char(60) NOT NULL default '',
+  MODIFY User char(16) NOT NULL default '',
+  MODIFY Password char(41) NOT NULL default '',
+  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
+ALTER TABLE db
+  MODIFY Host char(60) NOT NULL default '',
+  MODIFY Db char(64) NOT NULL default '',
+  MODIFY User char(16) NOT NULL default '',
+  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
+ALTER TABLE host
+  MODIFY Host char(60) NOT NULL default '',
+  MODIFY Db char(64) NOT NULL default '',
+  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
+ALTER TABLE func
+  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
+ALTER TABLE columns_priv
+  MODIFY Host char(60) NOT NULL default '',
+  MODIFY Db char(64) NOT NULL default '',
+  MODIFY User char(16) NOT NULL default '',
+  MODIFY Table_name char(64) NOT NULL default '',
+  MODIFY Column_name char(64) NOT NULL default '',
+  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
+ALTER TABLE tables_priv
+  MODIFY Host char(60) NOT NULL default '',
+  MODIFY Db char(64) NOT NULL default '',
+  MODIFY User char(16) NOT NULL default '',
+  MODIFY Table_name char(64) NOT NULL default '',
+  MODIFY Grantor char(77) NOT NULL default '',
+  ENGINE=MyISAM, CONVERT TO CHARACTER SET utf8 COLLATE utf8_bin;
 ALTER TABLE user add File_priv enum('N','Y') NOT NULL;
 CREATE TABLE IF NOT EXISTS func (
   name char(64) binary DEFAULT '' NOT NULL,