[FIX] hw_scanner: don't try to grab() a non-existing device
This would generate an ERROR entry in the log every 5 seconds as long as no barcode scanner is plugged in.
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@ -172,6 +172,8 @@ class Scanner(Thread):
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else:
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else:
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time.sleep(5) # wait until a suitable device is plugged
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time.sleep(5) # wait until a suitable device is plugged
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device = self.get_device()
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device = self.get_device()
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if not device:
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continue
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try:
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try:
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device.grab()
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device.grab()
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