caller doesn't manage --no-audio correctly

[fralbo]

Hello,

In case of audiodev.so import failure we cannot use caller.py module even if we specified --no-audio option.
In fact it's due to a problem in the import statement which is:

try: import audiodev, audiospeex, audiotts, audioop
except ImportError: audiodev, audiospeex = audiotts = audioop = None

so if audiodev import fails, all imports including audiotts are set to None. But later in the code we have:

if options.recognize and sr is None:
    raise ImportError('please install speech_recognition module in your PYTHONPATH to use --recognize option')
if options.textspeech and audiotts is None:
    raise ImportError('please install py-audio in your PYTHONPATH to use --textspeech option')
if options.audio and audiodev is None:
    raise ImportError('please install py-audio in your PYTHONPATH to use audio, otherwise start with --no-audio option')

So if you use --textspeech option you will verify the second if test which is wrong because the problem came from audiodev.

Imports should be:

try: import audiospeex, audiotts, audioop
except ImportError: audiospeex = audiotts = audioop = None

try: import audiodev
except ImportError: audiodev = None