[SDL] [sdl_image] Compile errors on darwin8 with libSDL_image and libPNG

[Simon]

> Anybody has an idea?

After investigating a bit I found the following page:
http://www.petercooper.co.uk/archives/000698.html
It says: "[...] I discovered it's an issue with gcc 3.x. Installing
gcc 4.x from the Tiger DVD Developers Tools fixed it."

I did verify, `gcc -v` yields:
Reading specs from /usr/lib/gcc/powerpc-apple-darwin8/4.0.0/specs
Configured with: /private/var/tmp/gcc/gcc-4061.obj~8/src/configure
--disable-checking --prefix=/usr --mandir=/share/man
--enable-languages=c,objc,c++,obj-c++
--program-transform-name=/^[cg][^+.-]*$/s/$/-4.0/
--with-gxx-include-dir=/include/gcc/darwin/4.0/c++
--build=powerpc-apple-darwin8 --host=powerpc-apple-darwin8
--target=powerpc-apple-darwin8
Thread model: posix
gcc version 4.0.0 20041026 (Apple Computer, Inc. build 4061)

And it is Tiger, installed from the CD...
Still investigatin...

Simon