Pádraig Brady e0596715dc zstd: fix crash when not overwriting existing files ...

This fixes the following crash:
  $ touch exists
  $ programs/zstd -r examples/ -o exists
  zstd: exists already exists; not overwritten
  Segmentation fault (core dumped)

* programs/fileio.c (FIO_compressMultipleFilenames):
Handle the case where we're not overwriting the destination.

Reported at https://bugzilla.redhat.com/1530049

2018-01-02 15:24:09 +00:00

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