Partly fix and swap 2005/giljade alt and original

The version that compiles with clang now will run some of the self-tests
right. Unfortunately it does not run them all okay. Because of this I
have decided to make the clang compilable version the alt code and the
one that will work with compilers without clang's defect (or this
specific defect amongst others of clang I might say) is the original
(well the fixed original).

The clang version fix has something of a hack in it to make it work
somewhat but it's not ideal. This is another reason that I have for now
moved it to the alt version. I explain more in bugs.md.

The Makefile has been updated to note that the code requires a compiler
that will let one have non-standard types of args to main() and that if
one does not have such a compiler they should use the alternate code
instead.

In time I hope to look at this more and then we might not have to have
two versions but we shall see.

2005/giljade/Makefile

@@ -134,6 +134,8 @@ all: data ${TARGET}
 	supernova deep_magic magic charon pluto
 
 ${PROG}: ${PROG}.c
+	@echo "NOTE: this version requires non-standard args to main() and will fail with"
+	@echo "some compilers like clang. Try make alt for such compilers."
 	${CC} ${CFLAGS} $< -o $@ ${LIBS}
 
 # alternative executable