-- a/src/imageio/format/png.c 2011-09-21 20:22:51.354705840 +0200
++ b/src/imageio/format/png.c 2011-09-21 20:22:40.305843971 +0200
#include <stdlib.h>
#include <stdio.h>
#include <png.h>
#include <zlib.h>
#include <inttypes.h>
DT_MODULE(1)