fixed some issues with 64bits compilation. tnx, NotSpooky!
yet it is not possible to build 64bit Amper due to dmd bug:
Error: undefined identifier '__va_list_tag'
yes, exactly like that: no error line, nothing more. sorry, i don't have
64bit system, so i cannot do much with that. i tried some obvious
workarounds, but without any success. 32bit ftw!
