Inconvenient that blk2bstr() doesn't accept NULL pointer when size is 0

[DamjanJovanovic]

blk2bstr(NULL, 0) always fails.

Why can't empty bstrings be created that way? Zero characters don't require accessing the pointer.

[rdmark]

Thanks for the report. The current behavior follows Bstrlib’s historical policy of rejecting null parameters unless an API explicitly documents otherwise. blk2bstr() inherited that rule, including for a zero-length block.

I agree that (NULL, 0) is a useful and safe representation of an empty block: no source memory is read in that case. PR #220 has been filed with the narrow fix for this.