iio: generic_buffer: Fix --trigger-num option
Initialize trig_num to -1 and handle trig_num=0 as a valid id. Fixes: 7c7e9dad (iio: iio_generic_buffer: Add --trigger-num option) Signed-off-by:Crestez Dan Leonard <leonard.crestez@intel.com> Signed-off-by:
Jonathan Cameron <jic23@kernel.org>
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