Fix: foreign key to country use same type

htdocs/install/mysql/migration/2.8.0-2.9.0.sql

@@ -160,3 +160,6 @@ INSERT INTO `llx_c_field_list` (`rowid`, `element`, `entity`, `name`, `alias`, `
 (7, 'product_default', 1, 'p.stock', 'stock', 'Stock', 'right', 0, 0, '$conf->stock->enabled', 7),
 (8, 'product_default', 1, 'p.envente', 'status', 'Status', 'right', 1, 0, '1', 8);
 
+
+UPDATE llx_adherent SET pays = null where pays <= 0 and pays != '0';
+ALTER table llx_adherent MODIFY pays integer;

htdocs/install/mysql/tables/llx_adherent.sql

@@ -42,7 +42,7 @@ create table llx_adherent
   adresse          text,
   cp               varchar(30),
   ville            varchar(50),
-  pays             varchar(50),
+  pays             integer,
   email            varchar(255),
   phone            varchar(30),
   phone_perso      varchar(30),