Null pdb ids are not handled correctly in a few places #1019
Description
This happens more often when reading non-PDB-deposited PDB/mmCIF/mmtf/BCIF files
For instance, this causes this issue: rcsb/symmetry#113
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This happens more often when reading non-PDB-deposited PDB/mmCIF/mmtf/BCIF files
For instance, this causes this issue: rcsb/symmetry#113