Recover from rare error condition from LIRC (home-assistant#2267)

* More resilient accessing of LIRC codes to handle rare error case.

* Line length fix in LIRC

homeassistant/components/lirc.py

@@ -66,7 +66,12 @@ def run(self):
         """Main loop of LIRC interface thread."""
         import lirc
         while not self.stopped.isSet():
-            code = lirc.nextcode()  # list; empty if no buttons pressed
+            try:
+                code = lirc.nextcode()  # list; empty if no buttons pressed
+            except lirc.NextCodeError:
+                _LOGGER.warning('Encountered error reading '
+                                'next code from LIRC')
+                code = None
             # interpret result from python-lirc
             if code:
                 code = code[0]