can be observed with MSVC 2010SP1 (16.0.40219.1) x86 target in dbg configuation:
C:\047rls\reactos\drivers\bus\acpi\cmbatt\cmbatt.c(983) : warning C4146: unary minus operator applied to unsigned type, result still unsigned
partial pick of 0.4.13-dev-713-g 08c6d21e1f