I just tried to compile package WindowMaker-applets-1.0-660 with a
prerelease of the GNU C compiler version 4.1. It said

1.

wmcube.c:685: warning: operation on `i' may be undefined

The source code is

	zorder[i+1] = zorder[i--];

I agree with the compiler - this code seems to be undefined.

Suggest new code  

	zorder[i+1] = zorder[i];
	--i;

2.

wmcube.c:959: warning: operation on `i' may be undefined

The source code is

	fscanf(fp,"%d %d",&cline[i++],&cline[i++]);

I agree with the compiler - this code seems to be undefined.

Suggest new code  

	fscanf( fp, "%d %d", &cline[i], &cline[i + 1]);
	i += 2;

BTW, the email address of the author is broken
[ robkli-8@student.luth.se ]