Fix trigger of error message

plugin.py

@@ -296,7 +296,7 @@ class BasePlugin:
                 response = requests.get(url, headers=headers, timeout=self._HTTP_TIMEOUT).json()
             except Exception as exc:
                 message = f"Cannot open connection to Heatzy API to get the mode for {alias} (retry={self.retry}): {exc}"
-                if self.retry < 0:
+                if self.retry <= 0:
                     Domoticz.Error(message)
                 else:
                     Domoticz.Status(message + f" (retry left: {self.retry})")