server: Replace __int64 with INT64.
__int64 has an inconsistent alignment: 4 bytes on Unix, 8 bytes on PE.
Fix this by using INT64/UINT64 which has consistent alignment on both Unix and PE side.
__int64 has an inconsistent alignment: 4 bytes on Unix, 8 bytes on PE.
Fix this by using INT64/UINT64 which has consistent alignment on both Unix and PE side.