Bug in helpers.py when logging error

[laszlojakab]

There is a bug in helpers.py, there is no reference to self (used in exception handling). See logs below:

2024-06-08 14:08:18.551 ERROR (MainThread) [homeassistant] Error doing job: Future exception was never retrieved
Traceback (most recent call last):
  File "/config/custom_components/daily/helpers.py", line 28, in convert_to_float
    return float(float_value)
           ^^^^^^^^^^^^^^^^^^
ValueError: could not convert string to float: 'unknown'

During handling of the above exception, another exception occurred:

Traceback (most recent call last):
  File "/usr/local/lib/python3.12/concurrent/futures/thread.py", line 58, in run
    result = self.fn(*self.args, **self.kwargs)
             ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/config/custom_components/daily/sensor.py", line 74, in <lambda>
    lambda event: self._handle_update(  # pylint: disable=unnecessary-lambda
                  ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/config/custom_components/daily/sensor.py", line 100, in _handle_update
    the_val = convert_to_float(input_state)
              ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File "/config/custom_components/daily/helpers.py", line 32, in convert_to_float
    float_value, self.coordinator.input_sensor
                 ^^^^