remove unecessary file + better error handling

airtime_mvc/public/js/airtime/library/library.js

@@ -492,8 +492,10 @@ var AIRTIME = (function(AIRTIME) {
             "fnStateLoad": function fnLibStateLoad(oSettings) {
                 var settings = localStorage.getItem('datatables-library');
                
-                if (settings !== "") {
+                try {
                     return JSON.parse(settings);
+                } catch (e) {
+                    return null;
                 }
             },
             "fnStateLoadParams": function (oSettings, oData) {
@@ -501,6 +503,7 @@ var AIRTIME = (function(AIRTIME) {
                     length,
                     a = oData.abVisCols;
                 
+                if (a) {
                     // putting serialized data back into the correct js type to make
                     // sure everything works properly.
                     for (i = 0, length = a.length; i < length; i++) {
@@ -508,13 +511,16 @@ var AIRTIME = (function(AIRTIME) {
                             a[i] = (a[i] === "true") ? true : false;
                         } 
                     }
+                }
                     
                 a = oData.ColReorder;
+                if (a) {
                     for (i = 0, length = a.length; i < length; i++) {
                         if (typeof(a[i]) === "string") {
                             a[i] = parseInt(a[i], 10);
                         }
                     }
+                }
                 
                 oData.iEnd = parseInt(oData.iEnd, 10);
                 oData.iLength = parseInt(oData.iLength, 10);