[PATCH] more robust virtualbox hook

[Ronny Standtke <ronny.standtke@fhnw.ch>]

Hi

I had to change my package list for a short test but kept all my hooks
and includes in place. Building failed because the virtualbox hook
stumbled over the missing defaults file. The attached patch makes the
virtualbox hook more stable and prevents this kind of problem.

Regards

Ronny Standtke

-- 
Ronny Standtke                 Fachhochschule Nordwestschweiz
Dozent Medienpädagogik / ICT   Pädagogische Hochschule
Telefon: +41 32 627 92 47      Obere Sternengasse 7
Mobil  : +41 79 786 81 82      4502 Solothurn

diff --git a/examples/hooks/virtualbox-ose.sh b/examples/hooks/virtualbox-ose.sh
index bcf7289..4f25cef 100755
--- a/examples/hooks/virtualbox-ose.sh
+++ b/examples/hooks/virtualbox-ose.sh
@@ -5,4 +5,8 @@
 # directory.
 
 # Enabling loading of vboxdrv
-sed -i -e 's|^LOAD_VBOXDRV_MODULE=.*$|LOAD_VBOXDRV_MODULE=1|' /etc/default/virtualbox-ose
+VBOX_DEFAULTS=/etc/default/virtualbox-ose
+if [ -e ${VBOX_DEFAULTS} ]
+then
+	sed -i -e 's|^LOAD_VBOXDRV_MODULE=.*$|LOAD_VBOXDRV_MODULE=1|' ${VBOX_DEFAULTS}
+fi