Fix default of a column

htdocs/install/mysql/migration/4.0.0-5.0.0.sql

@@ -8,6 +8,7 @@
 -- To rename a column:      ALTER TABLE llx_table CHANGE COLUMN oldname newname varchar(60);
 -- To drop a column:        ALTER TABLE llx_table DROP COLUMN oldname;
 -- To change type of field: ALTER TABLE llx_table MODIFY COLUMN name varchar(60);
+-- To set a DEFAULT value:  ALTER TABLE llx_table ALTER COLUMN name SET DEFAULT (0|NULL|...);
 -- To drop a foreign key:   ALTER TABLE llx_table DROP FOREIGN KEY fk_name;
 -- To drop an index:        -- VMYSQL4.0 DROP INDEX nomindex on llx_table
 -- To drop an index:        -- VPGSQL8.0 DROP INDEX nomindex
@@ -19,7 +20,6 @@
 -- To set a field as NULL:                     -- VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name DROP NOT NULL;
 -- To set a field as NOT NULL:                 -- VMYSQL4.3 ALTER TABLE llx_table MODIFY COLUMN name varchar(60) NOT NULL;
 -- To set a field as NOT NULL:                 -- VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name SET NOT NULL;
--- To set a field as default NULL:             -- VPGSQL8.2 ALTER TABLE llx_table ALTER COLUMN name SET DEFAULT NULL;
 -- Note: fields with type BLOB/TEXT can't have default value.
 -- -- VPGSQL8.2 DELETE FROM llx_usergroup_user      WHERE fk_user      NOT IN (SELECT rowid from llx_user);
 -- -- VMYSQL4.1 DELETE FROM llx_usergroup_user      WHERE fk_usergroup NOT IN (SELECT rowid from llx_usergroup);
@@ -32,6 +32,8 @@ UPDATE llx_const SET name = __ENCRYPT('THIRDPARTY_DEFAULT_CREATE_CONTACT')__ WHE
 ALTER TABLE llx_product_lot MODIFY COLUMN entity integer DEFAULT 1;
 UPDATE llx_product_lot SET entity = 1 WHERE entity IS NULL;
 
+ALTER TABLE llx_societe ALTER COLUMN fk_stcomm SET DEFAULT 0;
+
 ALTER TABLE llx_c_actioncomm ADD COLUMN picto varchar(48);
 
 ALTER TABLE llx_facturedet ADD INDEX idx_facturedet_fk_code_ventilation (fk_code_ventilation);