onewire: fix some variable declarations that should have been signed.
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@ -216,7 +216,7 @@ onewire_addr_t onewire_search_next(onewire_search_t *search, int pin) {
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uint8_t id_bit_number;
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uint8_t last_zero, search_result;
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int rom_byte_number;
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uint8_t id_bit, cmp_id_bit;
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int8_t id_bit, cmp_id_bit;
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onewire_addr_t addr;
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unsigned char rom_byte_mask;
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bool search_direction;
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