Fix exception on account/client key mismatch

plugin-manifest.json

@@ -13,8 +13,8 @@
     "win32"
   ],
   "requirements": [
-    "gajim>=1.8,<1.9"
+    "gajim>=1.8,<1.10"
   ],
   "short_name": "avatarshapeplugin",
-  "version": "0.0.1"
+  "version": "0.0.2"
 }

plugin.py

@@ -187,8 +187,7 @@ class AvatarShapePlugin(GajimPlugin):
         avatar.generate_default_avatar.cache_clear()
         avatar.make_workspace_avatar.cache_clear()
 
-        for account in app.settings.get_accounts():
-            client = app.get_client(account)
+        for client in app.get_clients():
             for contact in client.get_module('Contacts')._contacts.values():
                 contact.notify('avatar-update')
                 if contact.is_groupchat: