Msvc warning

[radkesvat]

Hi,

I am getting this warning on my local MSVC 2019 setup

(only for x86 build, x64 is ok)

include\stc\common.h(253): warning C4310: cast truncates constant value
include\stc\common.h(258): warning C4310: cast truncates constant value
include\stc\common.h(266): warning C4310: cast truncates constant value

I think we should simply disable it in common.h header as far as i know, i dont have any idea of the hash function being used there
maybe use int64 instead of size_t ...?

if you want i can also submit a PR