Fix: Compatibility with jQuery 2's isPlainObject. API instances were returning as plain objects

- This appears to be caused by setting the prototype chain as an object
  directly. For example:

  var test = function () {};
  test.prototype = {};
  $.isPlainObject( new test() );

  will return `true` with jQuery 2.1.4 (and `false` for 1.11.3).

  If an item is added to the prototype object then it will return
  `false`, although for some reason that wasn't the case with
  DataTables' API prototype.

  More investigation required, but for full compatiblity with exisiting
  jQuery releases, the correct thing to do here is to build on the
  exisiting prototype, which we can do with `$.extend`.

.datatables-commit-sync

@@ -1 +1 @@
-6f5ada12b6eb080305858981d2a11e8873354d3a
+2b8674aa2395b7be7f923e044fdb062e93a8af4e

media/js/jquery.dataTables.js

@@ -6791,7 +6791,9 @@
 	
 	DataTable.Api = _Api;
 	
-	_Api.prototype = /** @lends DataTables.Api */{
+	// Don't destroy the existing prototype, just extend it. Required for jQuery 2's
+	// isPlainObject.
+	$.extend( _Api.prototype, {
 		any: function ()
 		{
 			return this.count() !== 0;
@@ -7037,7 +7039,7 @@
 	
 	
 		unshift: __arrayProto.unshift
-	};
+	} );
 	
 	
 	_Api.extend = function ( scope, obj, ext )

media/js/jquery.dataTables.min.js

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