Fix BlockThreshold Callback argument conversion once more

The conversion was changed from "OssiiO" to "OssLLO". Unfortunately the arguments are unsigned long long, where the proper coversion character is 'K'.

Fixes: !40 (merged) Fixes: fd069ac8 Resolves: https://bugzilla.redhat.com/show_bug.cgi?id=1976109 Signed-off-by: Peter Krempa pkrempa@redhat.com