macOS: pitop still crashes on initialization on macOS when CPU util == 0

[ymode]

when pitop is initialized on macOS and CPU utilization is 0 the current issue arises:

line 143, in <module>
    process_items = urwid.SimpleFocusListWalker(get_process_list())
                                                ^^^^^^^^^^^^^^^^^^
  File "~/pitop/pitop/./pitop.py", line 131, in get_process_list
    process_list.append(ProcessRow(proc_info))
                        ^^^^^^^^^^^^^^^^^^^^^
  File "~/pitop/pitop/./pitop.py", line 16, in __init__
    cpu = f"{proc_info['cpu_percent']:.1f}"
          ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
TypeError: unsupported format string passed to NoneType.__format__

this issue is not present on linux