[gcompris] instruments activity: added a check for sound availability in the icon menu.

[Bruno Coudoin <bcoudoin src gnome org>]

commit 1a5c67133eaf8420d5686fa8844df2502a4b9e17
Author: Bruno Coudoin <bruno coudoin free fr>
Date:   Tue Dec 27 20:29:39 2011 +0100

    instruments activity: added a check for sound availability in the icon menu.

 src/instruments-activity/instruments.xml.in |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/src/instruments-activity/instruments.xml.in b/src/instruments-activity/instruments.xml.in
index ed4216e..c8bb177 100644
--- a/src/instruments-activity/instruments.xml.in
+++ b/src/instruments-activity/instruments.xml.in
@@ -7,6 +7,7 @@
 	 mode="nobackgroundmusic"
 	 difficulty="4"
 	 icon="instruments.svg"
+	 mandatory_sound_file="instruments/accordion.ogg"
 	 author="Sylvain Dechy (syl 1 free fr)"
 	 boarddir="instruments"
 	 demo="1">