Fix partner notify_email before uninstall

im_notif/__init__.py

@@ -1 +1,8 @@
 import im_notif_models
+
+
+def pre_uninstall(cr, registry):
+    query = ("UPDATE res_partner "
+             "SET notify_email = 'always' "
+             "WHERE notify_email LIKE 'im%';")
+    cr.execute(query)

im_notif/__openerp__.py

@@ -14,4 +14,5 @@
         'im_notif_views.xml',
         ],
     'installable': True
+    'uninstall_hook': 'pre_uninstall',
 }