Reactos

[SYSDM] General page: Auto-update the system uptime (#4616) master

- Also insert curly-brackets for switch-case in GeneralPageProc - Use correct printf data type for the system uptime Reviewed-by: Stanislav Motylkov <x86corez@gmail.com> Reviewed-by: Hermès Bélusca-Maïto <hermes.belusca-maito@reactos.org>