From e0d6337a1e3522ebaa7a8732239caaa07b5ba59c Mon Sep 17 00:00:00 2001
From: John Firebaugh <john.firebaugh@gmail.com>
Date: Tue, 23 Apr 2013 15:00:45 -0700
Subject: [PATCH] End zoom if somehow we miss the mouseup (#1326)

---
 js/lib/d3.v3.js | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/js/lib/d3.v3.js b/js/lib/d3.v3.js
index b8c1708f8..c275f39ab 100644
--- a/js/lib/d3.v3.js
+++ b/js/lib/d3.v3.js
@@ -1499,6 +1499,10 @@ d3.behavior.zoom = function() {
     d3_eventCancel();
 
     function mousemove() {
+      if (d3.event.which === 0) {
+        mouseup();
+        return;
+      }
       moved = 1;
       translateTo(d3.mouse(target), l);
       dispatch(event_);