Fix undefined profile being requested

src/qml/EventHandlers/rooms.js

@@ -72,7 +72,6 @@ function onRoomUpdated(
             item
         )
     } else {
-        print("re", replace, display_name)
         rooms.set(replace, item)
     }
 

src/qml/Models/Users.qml

@@ -4,6 +4,10 @@ import "../Base"
 
 HListModel {
     function getUser(user_id) {
+        // Happens when SortFilterProxyModel ExpressionFilter/Sorter/Role tests
+        // the expression with invalid data to establish property bindings
+        if (! user_id) { return }
+
         var found = getWhere({"userId": user_id}, 1)
         if (found.length > 0) { return found[0] }