From a51940723b8e688c999852b96fdc9ab27e24153e Mon Sep 17 00:00:00 2001
From: Alexander <alexander.mikhnovets@gmail.com>
Date: Thu, 25 Feb 2016 11:07:11 +0300
Subject: [PATCH] Fix exception when data field is empty

Treat empty fields (empty data variable) as '-1' digit.
While sorting put this fields to the end/beginning.
---
 sorting/file-size.js | 8 ++++++--
 1 file changed, 6 insertions(+), 2 deletions(-)

diff --git a/sorting/file-size.js b/sorting/file-size.js
index 017a5a0..f38597d 100644
--- a/sorting/file-size.js
+++ b/sorting/file-size.js
@@ -29,6 +29,10 @@ jQuery.fn.dataTable.ext.type.order['file-size-pre'] = function ( data ) {
         pb: 1000000000000000
     };
 
-    var multiplier = multipliers[matches[2].toLowerCase()];
-    return parseFloat( matches[1] ) * multiplier;
+    if (matches) {
+        var multiplier = multipliers[matches[2].toLowerCase()];
+        return parseFloat( matches[1] ) * multiplier;
+    } else {
+        return -1;
+    };
 };