Also fix MSVC build: For some reason Microsoft's sad excuse of a compiler
only sets __cplusplus to a value from this millenium if the
/Zc:__cplusplus compiler option is set, but that's only supported from
VS2017 15.7 on. The alternative is to use _MSVC_LANG, which always holds
the version that __cplusplus *should* have...
idStr::(V)Format() is a static (v)printf-like function that returns
and idStr. Can be used like a better va(), or for
idStr mystr = idStr::Format( "number of items: %d", myarr.Num() );
Everytime List.h is included in a new file (and sys/platform.h isn't)
there are confusing compiler-errors..
So just #include sys/platform.h in List.h directly, because it uses
ID_INLINE which is defined there
GCC had shitloads of superfluous warnings wherever List.h and Str.h were
included.. get rid of them by using #pragma GCC diagnostic at some places
in List.h and Str.h.
Also add some casts, initialize some variables for other warnings
