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67e1834ad4
* scd/apdu.c (pcsc): Add flag context_valid, remove count. (close_pcsc_reader): Use new flag instead of looking at magic context value. (pcsc_init): Set new flag. (open_pcsc_reader): Use new flag. (apdu_init): Clear new flag. * scd/apdu.c: Remove assert.h. Replace all assert by log_assert. -- The previous fix 192113552faa98f40cc91fe014ec55861474626c did not help, thus the new hypothesis is that PC/SC might return a valid context with the value -1. We now use a dedicated flag to track the validity of the context. The reference counting seems to be superfluous and is a relict due to backporting from 2.3. Removed.