(I am not subscribed to the list, please CC me on any replies.)

I was compiling Inkscape 0.41 with GCC 4 and got a lot of errors about stuffing 64-bit pointers into 32-bit ints. I think I fixed them and here's the patch.

I didn't understand why some of the code was as it was, so this patch may be all wrong, but it compiled and seems to work well.