correction from patch_40_41_d: put auto-increment back in ditag table

sql/patch_41_42_e.sql

+# patch_40_41_e
+#
+# title: ditag correction from patch_40_41_d
+#
+# description: put auto increment back in the table
+
+alter table ditag change column ditag_id ditag_id int(10) unsigned  NOT NULL auto_increment;
+
+# patch identifier
+INSERT INTO meta (meta_key, meta_value) VALUES ('patch', 'patch_41_42_e.sql|ditag_autoincrement');