[Fractdev] varargs.h versus stdarg.h

Tim, It appears that gcc will not be supporting the use of varargs.h any more. They suggest using stdarg.h. This is fine, I had started to do that in my last patch. However, I am now stuck with the integer version that is patched but I can not compile. I've uploaded it to the fractint directory. Would you please compile it and let me know if it is okay? Is there any need to maintain the ability to use varargs.h? I had not thought of that when I was doing the last patch, but I can fix it if we need to keep the varargs.h code in place. Jonathan