node+face-management-protocol: Finalizing prefix registration (selfreg)

Change-Id: I88aa15b785824a53fcc167b57fb1f0831b5aa9fa
diff --git a/src/data.cpp b/src/data.cpp
index 2bbe9a1..5a31e50 100644
--- a/src/data.cpp
+++ b/src/data.cpp
@@ -33,7 +33,7 @@
   wire_.push_back(getMetaInfo().wireEncode());
 
   // Content
-  wire_.push_back(content_);
+  wire_.push_back(getContent());
 
   if (!signature_) {
     throw Error("Requested wire format, but data packet has not been signed yet");