Fix setting buffer unibyte when reading from a device

* src/fileio.c (Finsert_file_contents): Call Fset_buffer_multibyte
to make a (possibly non-empty) buffer unibyte.  (Bug#22096)

diff --git a/src/fileio.c b/src/fileio.c
index 6cda1e39eed0a6ec2a468fa0db345369dd79c723..8e44eb0d53967f283ccaad8fc42d3bb8107bc720 100644 (file)
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -4265,7 +4265,7 @@ by calling `format-decode', which see.  */)
          && NILP (replace))
        /* Visiting a file with these coding system makes the buffer
           unibyte.  */
-       bset_enable_multibyte_characters (current_buffer, Qnil);
+       Fset_buffer_multibyte (Qnil);
     }
 
   coding.dst_multibyte = ! NILP (BVAR (current_buffer, enable_multibyte_characters));