Merge pull request #300 from matrix-org/rav/handle_no_session_store

Avoid NPE when no sessionStore is given

Author: dbkr

lib/client.js

@@ -149,7 +149,7 @@ function MatrixClient(opts) {
     this._notifTimelineSet = null;
 
     this._crypto = null;
-    if (CRYPTO_ENABLED && opts.sessionStore !== null &&
+    if (CRYPTO_ENABLED && Boolean(opts.sessionStore) &&
             userId !== null && this.deviceId !== null) {
         this._crypto = new Crypto(
             this, this,