security: change enum to enum class in security-common.hpp

Change-Id: I5565c845cd57f3457c8120b11399a105fa83418d
Refs: #3083
diff --git a/src/security/pib-sqlite3.cpp b/src/security/pib-sqlite3.cpp
index 01e80f7..cbded5b 100644
--- a/src/security/pib-sqlite3.cpp
+++ b/src/security/pib-sqlite3.cpp
@@ -377,7 +377,7 @@
                              "VALUES ((SELECT id FROM identities WHERE identity=?), ?, ?, ?)");
   statement.bind(1, identity.wireEncode(), SQLITE_TRANSIENT);
   statement.bind(2, keyName.wireEncode(), SQLITE_TRANSIENT);
-  statement.bind(3, publicKey.getKeyType());
+  statement.bind(3, static_cast<int>(publicKey.getKeyType()));
   statement.bind(4, publicKey.get().buf(), publicKey.get().size(), SQLITE_STATIC);
   statement.step();
 }