Fix regression in PDFFunction

diff --git a/pdf.js b/pdf.js
index c9a23bc80806279833ba8b4c3ef0c24cda7fd1df..df3150f936cfad01b1fe98e1851fd2ae0ea2ef69 100644 (file)
--- a/pdf.js
+++ b/pdf.js
@@ -6682,6 +6682,8 @@ var PDFFunction = (function() {
       var diff = IR[2];
       var n    = IR[3];
       var i    = IR[4];
+      
+      var length = diff.length;
 
       return function(args) {
         var x = args[0];