simulation device: fix billboard xml file
diff --git a/simulated-devices/billboard/src/main/resources/billboard-resource.xml b/simulated-devices/billboard/src/main/resources/billboard-resource.xml
index d168d0c..697d20e 100644
--- a/simulated-devices/billboard/src/main/resources/billboard-resource.xml
+++ b/simulated-devices/billboard/src/main/resources/billboard-resource.xml
@@ -17,7 +17,13 @@
<method type="ACT">
<parameter name="message" type="string"/>
<references>
- <reference reference="MESSAGE" passOn="true" xsi:type="copyReference" index="0"/>
+ <reference reference="MESSAGE" passOn="true" xsi:type="copyReference">
+ <builder type="PARAMETER">
+ <argument type="int">
+ <value>0</value>
+ </argument>
+ </builder>
+ </reference>
</references>
</method>
</methods>