emacs-29 fa06249a9fb: Fix "C-x RET r" when the new encoding is UTF

[Eli Zaretskii]

branch: emacs-29
commit fa06249a9fbb0b0b67eb0d88cdb70b61723e67ed
Author: Eli Zaretskii <eliz@gnu.org>
Commit: Eli Zaretskii <eliz@gnu.org>

    Fix "C-x RET r" when the new encoding is UTF
    
    * src/fileio.c (Finsert_file_contents): Update point of
    'conversion_buffer' before decoding the last block.  (Bug#64253)
---
 src/fileio.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/src/fileio.c b/src/fileio.c
index b50b3c6b935..995e4142f58 100644
--- a/src/fileio.c
+++ b/src/fileio.c
@@ -4463,6 +4463,8 @@ by calling `format-decode', which see.  */)
 
       if (unprocessed > 0)
        {
+         BUF_TEMP_SET_PT (XBUFFER (conversion_buffer),
+                          BUF_Z (XBUFFER (conversion_buffer)));
          coding.mode |= CODING_MODE_LAST_BLOCK;
          decode_coding_c_string (&coding, (unsigned char *) read_buf,
                                  unprocessed, conversion_buffer);