Fix output-line-delay behavior

If output-line-delay is non-zero and output-delay is any, line delay
time set output-line-delay.
If output-line-delay is zero and output-delay is non-zero, line delay
time set output-delay.

It was previously (output-line-delay + output-delay) in any case.
Also, since the buffer was flushed after the line delay, there was a
possibility that the delay would be reduced or not applied at all.

src/tty.c

@@ -283,15 +283,14 @@ ssize_t tty_write(int fd, const void *buffer, size_t count)
             }
             bytes_written += retval;
 
+            fsync(fd);
+            tcdrain(fd);
+
             if (option.output_line_delay && *(unsigned char*)buffer == '\n')
             {
                 delay(option.output_line_delay);
             }
-
+            else if (option.output_delay)
-            fsync(fd);
-            tcdrain(fd);
-
-            if (option.output_delay)
             {
                 delay(option.output_delay);
             }