security: Adjust unlocking TPM process.

Change-Id: Iee8787bb9aaa8e05fab9544bd35ce9fe31eecf29
diff --git a/tools/ndnsec-certgen.cpp b/tools/ndnsec-certgen.cpp
index 8b3f21e..e40e392 100644
--- a/tools/ndnsec-certgen.cpp
+++ b/tools/ndnsec-certgen.cpp
@@ -268,6 +268,7 @@
       revocationCert.setName(certName);
 
       KeyChain keyChain;
+
       Name signingCertificateName = keyChain.getDefaultCertificateNameForIdentity(Name(signId));
 
       keyChain.sign (revocationCert, signingCertificateName);