line-reader: Fix null derefe in line_reader_for_fd() with null encoding.

[pspp] / src / libpspp / line-reader.c

diff --git a/src/libpspp/line-reader.c b/src/libpspp/line-reader.c
index 56a368da2965f08f6c7d9c43aa69ae5cfca155d9..cb4bd014b93ef6b90bd4e75d8649a216be009e2b 100644 (file)
--- a/src/libpspp/line-reader.c
+++ b/src/libpspp/line-reader.c
@@ -125,7 +125,7 @@ line_reader_for_fd (const char *encoding, int fd)
       && !strcmp (r->encoding, "ASCII"))
     {
       r->state = S_AUTO;
-      r->auto_encoding = xstrdup (encoding);
+      r->auto_encoding = encoding ? xstrdup (encoding) : NULL;
     }
   else
     r->state = r->encoding_info.unit == 1 ? S_UNIBYTE : S_MULTIBYTE;