fix: Check offset values of the devices for integers

In the event of a misconfiguration in PiCtory, it may happen that the
offset values are given as floating point numbers. These devices and
their IOs must ignore ModiO that it cannot be ensured which offset
is correct.

Signed-off-by: Sven Sager <akira@narux.de>

src/revpimodio2/modio.py

@@ -302,6 +302,19 @@ class RevPiModIO(object):
         # Devices initialisieren
         err_names_check = {}
         for device in sorted(lst_devices, key=lambda x: x["offset"]):
+            # Pre-check of values
+            if float(device.get("offset")) != int(device.get("offset")):
+                # Offset misconfigured
+                warnings.warn(
+                    "Offset value {0} of device {1} on position {2} is invalid. "
+                    "This device and all IOs are ignored.".format(
+                        device.get("offset"),
+                        device.get("name"),
+                        device.get("position"),
+                    )
+                )
+                continue
+
             # VDev alter piCtory Versionen auf KUNBUS-Standard ändern
             if device["position"] == "adap.":
                 device["position"] = 64