Fix exception 'NoneType' object has no attribute 'log_device_object_p…

…roperty'

This can happen if the read for logDeviceObjectProperty fails while building
the TrendLog object. Currently there's a debug message generated, for example:

DEBUG   | Property Access Error for <bacpypes.basetypes.ErrorType object at 0x7f0394564940>

but no other information and the exception stops the controller's points
list from getting populated

BAC0/core/devices/Device.py

@@ -855,6 +855,7 @@ def connect(self, *, db=None):
                 self.new_state(RPDeviceConnected)
 
             except (NoResponseFromController, AttributeError) as error:
+                self._log.warning("Error connecting: %s", error)
                 if self.properties.db_name:
                     self.new_state(DeviceFromDB)
                 else:

BAC0/core/devices/mixins/read_mixin.py

@@ -385,6 +385,8 @@ def _find_propid_index(key):
         for each in retrieve_type(objList, "trendLog"):
             point_address = str(each[1])
             tl = TrendLog(point_address, self, read_log_on_creation=False)
+            if tl.properties.log_device_object_property is None:
+                continue
             ldop_type, ldop_addr = (
                 tl.properties.log_device_object_property.objectIdentifier
             )