Index: lib/MsgUtils/scripts/templates/MsgDefs_cpp.jinja
===================================================================
diff -u -rcfc0df719cb5033078d0cac45ce0f6243810f2e7 -rfa691c15183dfe8596de699ef8c3a7fcdb90edab
--- lib/MsgUtils/scripts/templates/MsgDefs_cpp.jinja	(.../MsgDefs_cpp.jinja)	(revision cfc0df719cb5033078d0cac45ce0f6243810f2e7)
+++ lib/MsgUtils/scripts/templates/MsgDefs_cpp.jinja	(.../MsgDefs_cpp.jinja)	(revision fa691c15183dfe8596de699ef8c3a7fcdb90edab)
@@ -130,7 +130,7 @@
             auto proto = payload.toProtobuf();
             updateHeader(proto.mutable_header());
             std::ostringstream out;
-            proto.SerializeToOstream(&out);
+            (void)proto.SerializeToOstream(&out);
             return out.str().c_str();
             break;
         }