From 98d75e27e2f550c07d07df547f21e73b729d339c Mon Sep 17 00:00:00 2001
From: Alyssa Morrow <akmorrow@berkeley.edu>
Date: Sun, 1 Oct 2017 21:08:07 -0700
Subject: [PATCH] fixed check for forced referenceId in GA4GH examples

---
 src/main/sources/GA4GHAlignmentSource.js | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/src/main/sources/GA4GHAlignmentSource.js b/src/main/sources/GA4GHAlignmentSource.js
index a0b293dd..c17f590f 100644
--- a/src/main/sources/GA4GHAlignmentSource.js
+++ b/src/main/sources/GA4GHAlignmentSource.js
@@ -117,7 +117,7 @@ function create(spec: GA4GHSpec): AlignmentDataSource {
     o.trigger('networkprogress', {numRequests});
     // hack for DEMO. force GA4GH reference ID
     var contig = range.contig;
-    if (spec.forcedReferenceId !== null)
+    if (spec.forcedReferenceId !== undefined)
     {
       contig = spec.forcedReferenceId;
     }