plugins/dac_data_manager: Create iio buffer at the right moment #506
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PR Description
The idea behind the fix is the following: due to libiio v1.x API changes the creation of the iio_buffer cannot be done too early. It needs a iio_mask and at least one channel to be enabled. The need to create the iio_buffer early was just to read one attribute about alignment, and to read the attribute only once.
The fix is to create the iio_buffer at the moment is needed and read the attribute right after the creation.
The effort for this fix started because osc was crashing at startup.
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