dc6281cf1d880c48904bf6d445a021a5936001bb Fix: A few let variables h…

…ad slipped in, which doesn't work in old Safari

https://datatables.net/forums/discussion/79829

Sync to source repo @dc6281cf1d880c48904bf6d445a021a5936001bb

datatables.json

@@ -11,5 +11,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.1.6",
-    "last-sync": "a7e148ff64c424bed3d6e86e91494357a9afba7c"
+    "last-sync": "dc6281cf1d880c48904bf6d445a021a5936001bb"
 }

js/dataTables.js

@@ -3041,8 +3041,8 @@
 	 * @returns 
 	 */
 	function _fnGetRowDisplay (settings, rowIdx) {
-		let rowModal = settings.aoData[rowIdx];
-		let columns = settings.aoColumns;
+		var rowModal = settings.aoData[rowIdx];
+		var columns = settings.aoColumns;
 
 		if (! rowModal.displayData) {
 			// Need to render and cache
@@ -7714,7 +7714,7 @@
 	// Reduce the API instance to the first item found
 	var _selector_first = function ( old )
 	{
-		let inst = new _Api(old.context[0]);
+		var inst = new _Api(old.context[0]);
 
 		// Use a push rather than passing to the constructor, since it will
 		// merge arrays down automatically, which isn't what is wanted here

js/dataTables.mjs

@@ -2988,8 +2988,8 @@ function _fnGetRowElements( settings, row, colIdx, d )
  * @returns 
  */
 function _fnGetRowDisplay (settings, rowIdx) {
-	let rowModal = settings.aoData[rowIdx];
-	let columns = settings.aoColumns;
+	var rowModal = settings.aoData[rowIdx];
+	var columns = settings.aoColumns;
 
 	if (! rowModal.displayData) {
 		// Need to render and cache
@@ -7661,7 +7661,7 @@ var _selector_opts = function ( opts )
 // Reduce the API instance to the first item found
 var _selector_first = function ( old )
 {
-	let inst = new _Api(old.context[0]);
+	var inst = new _Api(old.context[0]);
 
 	// Use a push rather than passing to the constructor, since it will
 	// merge arrays down automatically, which isn't what is wanted here