Hi, just letting you know (in English, sorry), that the patch works great, thanks!
With kernel 2.6.20, the lirc incorrectly searches for linux/config.h. You can either go to the directory containing the either header files or the complete source (whicever Lirc finds & uses) and create a directory linux and then touch linux/config.h, or simply comment out the includes in the code.
maker, could you please contact the Lirc project mailing list and send your patch there, unless you have already made so? That way we'll get it in the official development tree.
Thanks again!