Fix build break caused by bad merge during commit 7b80518e72

src/tools/wix/Data/messages.xml

@@ -2923,6 +2923,8 @@
         <Instance>
           There is no media defined for disk id '{0}'. You must author either &lt;Media Id='{0}' ...&gt; or &lt;MediaTemplate ...&gt;.
           <Parameter Type="System.Int32" Name="diskId" />
+        </Instance>
+      </Message>
       <Message Id="RemotePayloadUnsupported" Number="383">
         <Instance>
           The RemotePayload element can only be used for ExePackages.