klippy: Warn if starting klippy with logging disabled

Signed-off-by: Kevin O'Connor <kevin@koconnor.net>

klippy/klippy.py

@@ -269,6 +269,9 @@ def main():
             "CPU: %s" % (util.get_cpu_info(),),
             "Python: %s" % (repr(sys.version),)])
         logging.info(versions)
+    elif not options.debugoutput:
+        logging.warning("No log file specified!"
+                        " Severe timing issues may result!")
 
     # Start Printer() class
     while 1: