Fix script on ubuntu pre-xenial

scripts/paint-it-black.sh

@@ -26,14 +26,17 @@ sedfilter() {
 	return "$RETCODE"
 }
 
+THEMEDIR="/usr/share/plymouth/themes" # xenial and up
+[ -f "$THEMEDIR/ubuntu-logo/ubuntu-logo.grub" ] || THEMEDIR="/lib/plymouth/themes" # until wily
+
 sedfilter \
-	/usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.grub \
+	"$THEMEDIR/ubuntu-logo/ubuntu-logo.grub" \
 	's/background_color [0-9]+,[0-9]+,[0-9]+/background_color 0,0,0/'
 sedfilter \
-	/usr/share/plymouth/themes/ubuntu-logo/ubuntu-logo.script \
+	"$THEMEDIR/ubuntu-logo/ubuntu-logo.script" \
 	's/^(Window.SetBackground(Top|Bottom)Color ?)\(0\.[0-9]{1,2}, 0\.[0-9]{1,2}, 0\.[0-9]{1,2}\)/\1(0.00, 0.00, 0.00)/'
 sedfilter \
-	/usr/share/plymouth/themes/ubuntu-text/ubuntu-text.plymouth \
+	"$THEMEDIR/ubuntu-text/ubuntu-text.plymouth" \
 	's/^black=0x[a-fA-F0-9]{6}/black=0x000000/'
 
 notice "You may want to run 'update-initramfs -u -k all && update-grub' now :)"