rec_unlimited example: prefix "delme_" to file name

... in order to make it easier to delete unneeded files.

Author: mgeier

examples/rec_unlimited.py

@@ -49,7 +49,7 @@ def int_or_str(text):
         # soundfile expects an int, sounddevice provides a float:
         args.samplerate = int(device_info['default_samplerate'])
     if args.filename is None:
-        args.filename = tempfile.mktemp(prefix='rec_unlimited_',
+        args.filename = tempfile.mktemp(prefix='delme_rec_unlimited_',
                                         suffix='.wav', dir='')
     q = queue.Queue()