tree dfe8621088229c7d46caf956e934fab099450060
parent 9f5209caeadd45d7a7787005ec1a106540f93c88
author Jacob Bandes-Storch <jacob@bandes-stor.ch> 1566474693 -0700
committer Fokko Driesprong <fokko@apache.org> 1566474757 +0200

Fix std::string(NULL) in DataFile.cc (#539)

Per https://en.cppreference.com/w/cpp/string/basic_string/basic_string (5)
`s==NULL` is undefined behavior.

(cherry picked from commit 98c7c6cd898a156b5fe0cef93761f0e756ab94db)