fix error when saving unprotected notes

services/build.js

@@ -1 +1 @@
-module.exports = { build_date:"2017-11-16T19:29:52-05:00", build_revision: "c371ffb5974d8dccaec76c78dfa91dd54fcc624e" };
+module.exports = { build_date:"2017-11-17T00:09:29-05:00", build_revision: "a6bf04f8d4dc92445e6b4decd7dbbaa2f3e3ebaa" };

services/notes.js

@@ -166,7 +166,7 @@ async function updateNote(noteId, newNote, ctx) {
             await sync_table.addNoteHistorySync(newNoteHistoryId);
         }
 
-        await protectNoteHistory(noteId, ctx.getDataKey(), newNote.detail.is_protected);
+        await protectNoteHistory(noteId, ctx.getDataKeyOrNull(), newNote.detail.is_protected);
 
         await addNoteAudits(origNoteDetail, newNote.detail, ctx.browserId);
 

services/request_context.js

@@ -17,9 +17,18 @@ module.exports = function(req) {
         return protected_session.getDataKey(req);
     }
 
+    function getDataKeyOrNull() {
+        if (!isProtectedSessionAvailable()) {
+            return null;
+        }
+
+        return protected_session.getDataKey(req);
+    }
+
     return {
         browserId,
         isProtectedSessionAvailable,
-        getDataKey
+        getDataKey,
+        getDataKeyOrNull
     };
 };