installer.kmdr: added check for home partition size >= 512MB, mostly as the simplest way to avoid displaying extended or other partitions

installer/installer.kmdr

@@ -2707,6 +2707,7 @@ for device in $devices; do
    volsize=`get_udisks_key $device size`
    volsize=`expr $volsize / 1024 / 1024`
    volname=`get_udisks_key $device label`
+   [ $volsize -ge 512 ] || continue
    [ "$volname" ] || volname="unnamed"
    parttype=`get_udisks_key $device usage`
    [ "$parttype" ] || parttype="unknown"