fix terminating message buffer with \0

apps/jsonrpc/RpcPeer.cpp

@@ -196,8 +196,10 @@ int JsonrpcNetstringsConnection::netstringsRead() {
 	// DBG("received '%.*s'\n", rcvd_size, msgbuf);
 
 	if (rcvd_size == msg_size+1) { 
-	  if (msgbuf[msg_size] == ',')
+	  if (msgbuf[msg_size] == ',') {
+	    msgbuf[msg_size+1] = '\0';
 	    return DISPATCH;
+	  }
 	  INFO("Protocol error on connection [%p/%d]: netstring not terminated with ','\n",
 	       this, fd);
 	  close();