DeviceList: Remove Gtk.TreeIter from device_remove_event

For some reason the iter goes invalid and we end up with below critical.
This happens calling clear() and try to compare the iter to the selected.

(blueman-manager:11183): Gtk-CRITICAL **: 09:48:11.834: gtk_list_store_get_path: assertion 'iter->stamp == priv->stamp' failed

blueman/gui/DeviceList.py

@@ -119,7 +119,7 @@ def __on_manager_signal(self, manager, path, signal_name):
                 row = self.get(tree_iter, "device")
                 dev = row["device"]
 
-                self.device_remove_event(dev, tree_iter)
+                self.device_remove_event(dev)
 
     def on_selection_changed(self, selection):
         _model, tree_iter = selection.get_selected()
@@ -216,10 +216,9 @@ def row_update_event(self, tree_iter, key, value):
     def device_add_event(self, device):
         self.add_device(device)
 
-    def device_remove_event(self, device, tree_iter):
+    def device_remove_event(self, device):
         logging.debug(device)
-        if tree_iter is None:
-            tree_iter = self.find_device(device)
+        tree_iter = self.find_device(device)
 
         if self.compare(self.selected(), tree_iter):
             self.emit("device-selected", None, None)
@@ -337,7 +336,7 @@ def clear(self):
             for i in self.liststore:
                 tree_iter = i.iter
                 device = self.get(tree_iter, "device")["device"]
-                self.device_remove_event(device, tree_iter)
+                self.device_remove_event(device)
             self.liststore.clear()
             self.emit("device-selected", None, None)
 

blueman/gui/manager/ManagerDeviceList.py

@@ -202,7 +202,9 @@ def make_device_icon(self, icon_info, is_paired=False, is_trusted=False):
 
         return target
 
-    def device_remove_event(self, device, tree_iter):
+    def device_remove_event(self, device):
+        tree_iter = self.find_device(device)
+
         row_fader = self.get(tree_iter, "row_fader")["row_fader"]
         row_fader.connect("animation-finished", self.__on_fader_finished, device, tree_iter)
         row_fader.thaw()
@@ -212,7 +214,7 @@ def device_remove_event(self, device, tree_iter):
     def __on_fader_finished(self, fader, device, tree_iter):
         fader.disconnect_by_func(self.__on_fader_finished)
         fader.freeze()
-        super().device_remove_event(device, tree_iter)
+        super().device_remove_event(device)
 
     def device_add_event(self, device):
         self.add_device(device)