plugin XEP-0048: don't fail if a type is missing in bookmark data.

libervia/backend/plugins/plugin_xep_0048.py

@@ -443,7 +443,13 @@ class XEP_0048(object):
             bookmarks_ori = getattr(client, "bookmarks_" + _storage_location)
             if bookmarks_ori is None:
                 return ret
-            data = bookmarks_ori[type_]
+            try:
+                data = bookmarks_ori[type_]
+            except KeyError:
+                log.warning(
+                    f"{type_!r} missing in {storage_location} storage."
+                )
+                data = bookmarks_ori[type_] = {}
             for bookmark in data:
                 if type_ == XEP_0048.MUC_TYPE:
                     ret[_storage_location][bookmark.full()] = data[bookmark].copy()