actually builds and runs properly on big endian machines now, because we

actually builds and runs properly on big endian machines now, because we

* gdk/gdkrgb.c: actually builds and runs properly on big endian machines
now, because we #include config.h. Also fixed up a compile error in the
WORDS_BIGENDIAN case in gdk_rgb_convert_565_gray. I made the fix by looking
at patterns in the other code; Raph can you verify this?

* gdk/gdkthreads.c: #include <unistd.h> to quell compiler warnings

-Yosh