pc+-file-reader, sys-file-reader: Fix misuses of zero as null pointer.
authorBen Pfaff <blp@cs.stanford.edu>
Sat, 23 Sep 2017 17:40:10 +0000 (10:40 -0700)
committerBen Pfaff <blp@cs.stanford.edu>
Sat, 23 Sep 2017 17:40:10 +0000 (10:40 -0700)
Found by Clang.
Reported by Friedrich Beckmann.
Bug #52045.


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