REF:https://bugzilla.tianocore.org/show_bug.cgi?id=3204 Fixes the following compiler warning in VS2019 by changing defining the MmramRangeCount variable to be UINTN and type casting prior to value assignment. \edk2\StandaloneMmPkg\Core\StandaloneMmCore.c(570): error C2220: the following warning is treated as an error \edk2\StandaloneMmPkg\Core\StandaloneMmCore.c(570): warning C4244: '=': conversion from 'UINT64' to 'UINT32', possible loss of data Signed-off-by: Michael Kubacki <michael.kubacki@microsoft.com> Reviewed-by: Sami Mujawar <sami.mujawar@arm.com>