From edf813a20d1b098f21526f689049fcd3dd995472 Mon Sep 17 00:00:00 2001
From: Christoph Oberhofer <c.oberhofer@netconomy.net>
Date: Sat, 29 Aug 2015 20:45:53 +0200
Subject: [PATCH] Added polyfill for Math.imul to support IE

---
 src/typedefs.js | 9 +++++++++
 1 file changed, 9 insertions(+)

diff --git a/src/typedefs.js b/src/typedefs.js
index 585dfb6..dc13ab5 100644
--- a/src/typedefs.js
+++ b/src/typedefs.js
@@ -19,3 +19,12 @@ if (typeof window !== 'undefined') {
     navigator.getUserMedia = navigator.getUserMedia || navigator.webkitGetUserMedia || navigator.mozGetUserMedia || navigator.msGetUserMedia;
     window.URL = window.URL || window.webkitURL || window.mozURL || window.msURL;
 }
+Math.imul = Math.imul || function(a, b) {
+    var ah = (a >>> 16) & 0xffff,
+        al = a & 0xffff,
+        bh = (b >>> 16) & 0xffff,
+        bl = b & 0xffff;
+    // the shift by 0 fixes the sign on the high part
+    // the final |0 converts the unsigned value into a signed value
+    return ((al * bl) + (((ah * bl + al * bh) << 16) >>> 0)|0);
+};
\ No newline at end of file