MdeModulePkg/CoreDxe: Fixed compiler warning 'integer conversion resulted in a change of sign'
MdeModulePkg/CoreDxe: Fixed compiler warning 'integer conversion resulted in a change of sign'

Signed-off-by: Olivier Martin <olivier.martin@arm.com>
Reviewed-by: Sun Rui <rui.sun@intel.com>



git-svn-id: 5648d1bec6962b0a6d1d1b40eba8cf5cdb62da3d@13560 6f19259b-4bc3-4df7-8a09-765794883524

MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2,MattDevo/edk2