Auto size usage examples:

(1)

${GetSize} "C:\SomeDir" "/M=Image.iso /S=Auto" $0 $1 $2

$0=e.g."4,38 GB" ; with /S=0G it would be "4"

$1="1", $2="" ; same as without Auto

(2)

${GetSize} "4702989190" "" $0 $1 $2

$0="4,38 GB"

$1="", $2 = ""

Obviously keep in mind that returned size is a string that can't be treated as int.
