Fix: If filtering data is null, undefined or NaN it is not included i…

…n the filter

js/core/core.filter.js

@@ -332,22 +332,24 @@ function _fnFilterData ( settings )
 					cellData = '';
 				}
 
-				// If it looks like there is an HTML entity in the string,
-				// attempt to decode it so sorting works as expected. Note that
-				// we could use a single line of jQuery to do this, but the DOM
-				// method used here is much faster http://jsperf.com/html-decode
-				if ( cellData.indexOf && cellData.indexOf('&') !== -1 ) {
-					__filter_div.innerHTML = cellData;
-					cellData = __filter_div_textContent ?
-						__filter_div.textContent :
-						__filter_div.innerText;
+				if ( cellData ) {
+					// If it looks like there is an HTML entity in the string,
+					// attempt to decode it so sorting works as expected. Note that
+					// we could use a single line of jQuery to do this, but the DOM
+					// method used here is much faster http://jsperf.com/html-decode
+					if ( cellData.indexOf && cellData.indexOf('&') !== -1 ) {
+						__filter_div.innerHTML = cellData;
+						cellData = __filter_div_textContent ?
+							__filter_div.textContent :
+							__filter_div.innerText;
+					}
+
+					if ( cellData.replace ) {
+						cellData = cellData.replace(/[\r\n]/g, '');
+					}
+
+					filterData.push( cellData );
 				}
-
-				if ( cellData.replace ) {
-					cellData = cellData.replace(/[\r\n]/g, '');
-				}
-
-				filterData.push( cellData );
 			}
 
 			row._aFilterData = filterData;