added warning when getSelection cannot find input control

Author: risadams

dist/js/selectize.js

@@ -331,6 +331,10 @@
 	 */
 	var getSelection = function(input) {
 		var result = {};
+	  if(input === undefined) {
+	    console.warn('WARN getSelection cannot locate input control');
+	    return result;
+	  }
 		if ('selectionStart' in input) {
 			result.start = input.selectionStart;
 			result.length = input.selectionEnd - result.start;

dist/js/selectize.min.js

@@ -189,6 +189,10 @@ var watchChildEvent = function($parent, event, selector, fn) {
  */
 var getSelection = function(input) {
 	var result = {};
+  if(input === undefined) {
+    console.warn('WARN getSelection cannot locate input control');
+    return result;
+  }
 	if ('selectionStart' in input) {
 		result.start = input.selectionStart;
 		result.length = input.selectionEnd - result.start;