buffer: fix log message in read_buffer().

Signed-off-by: Michael Adam <obnox@samba.org>
(cherry picked from commit b59ecd0c66)

src/buffer.c

@@ -253,8 +253,8 @@ ssize_t read_buffer (int fd, struct buffer_s * buffptr)
                         break;
                 default:
                         log_message (LOG_ERR,
-                                     "readbuff: recv() error \"%s\" on file descriptor %d",
+                                     "read_buffer: read() failed on fd %d: %s",
-                                     strerror (errno), fd);
+                                     fd, strerror(errno));
                         bytesin = -1;
                         break;
                 }