fix condition pin is defined

added double quotes around the number, otherwise the condition is always true and it throws an exception on the octopi logs

Author: micdenny

octoprint_filamentreload/__init__.py

@@ -24,7 +24,7 @@ def on_after_startup(self):
         self.bounce = int(self._settings.get(["bounce"]))
         self.switch = int(self._settings.get(["switch"]))
 
-        if self._settings.get(["pin"]) != -1:   # If a pin is defined
+        if self._settings.get(["pin"]) != "-1":   # If a pin is defined
             self._logger.info("Filament Sensor active on GPIO Pin [%s]"%self.pin)
             GPIO.setup(self.pin, GPIO.IN, pull_up_down=GPIO.PUD_UP)    # Initialize GPIO as INPUT