fix rare bug in tlv.c (#788)

[proxmark3-svn] / traces / modulation-psk3.pm3

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97
84
46
38
3
3
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-5
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0
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2
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4
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5
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-62
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-55
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11
6
27
15
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12
24
6
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2
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12
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11
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10
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8