identify: make otsu() static.
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@ -174,7 +174,7 @@ static void flood_fill_seed(struct quirc *q, int x, int y, int from, int to,
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* Adaptive thresholding
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*/
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uint8_t otsu(const struct quirc *q)
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static uint8_t otsu(const struct quirc *q)
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{
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int numPixels = q->w * q->h;
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