cdrom.eclass: Append to PROPERTIES variable.

It is not accumulated across eclasses.

Signed-off-by: Ulrich Müller <ulm@gentoo.org>

diff --git a/eclass/cdrom.eclass b/eclass/cdrom.eclass
index 7b0eb9c6c3b5952ca7e7e00536e0bb97a103c93c..77b9d6ceb2092b8e498020cbebc500163a71fe84 100644 (file)
--- a/eclass/cdrom.eclass
+++ b/eclass/cdrom.eclass
@@ -1,4 +1,4 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: cdrom.eclass
@@ -28,9 +28,9 @@ inherit portability
 # conditionally based on USE="cdinstall".
 if [[ ${CDROM_OPTIONAL} == "yes" ]] ; then
        IUSE="cdinstall"
-       PROPERTIES="cdinstall? ( interactive )"
+       PROPERTIES+=" cdinstall? ( interactive )"
 else
-       PROPERTIES="interactive"
+       PROPERTIES+=" interactive"
 fi
 
 # @FUNCTION: cdrom_get_cds