For structs / arrays, json_to_vm_value() calls json_load_page() on
freshly allocated pages for which no constructor has been called.
json_load_page() should not call destructors for such uninitialized
pages.
json_load_page() is also called by BanMisc.LoadStruct and File.Read,
with an initialized struct. In that case destructors should be called.
This fixes crash in Widenyo after system.GroupLoad.
- Create separate directories for source and header files.
- Build code shared between xsystem4 and aindump as a static library.
- Create header dirs gfx/ system4/ and vm/
- Make CG.c/h usable without a running VM