Per Vas' request. If the compile fails for you (i'm thinking osx and
windows native debuggers here in particular), add '#include "emu.h"'
as first include of the cpp files that fail.
Due to our use of precompilation and forced inclusion, emu.h must be
included as the very first non-comment thing we do if we want to be
sure msvc compiles are identical to gcc/clang ones. Doing it directly
instead of through an include increases the correctness probability by
a magnitude.
Unified renderer in osd_window as std::unique_ptr
Made windows all std::shared_ptr<window_type>
Made window lists std::list<std::shared_ptr<window_type>>
Updated OSD SDL worker_param to not use malloc (not compatible with smart
pointers)
Made renderer pointer to window a weak reference. May not be available
during destruction of the window.