5409cb063df85deaaf952d962333cef6e061f4d3 Fix: :visible on its own a…

…s a column selector could incorrectly include hidden columns when used with a complex header.

https://datatables.net/forums/discussion/79089

Sync to source repo @5409cb063df85deaaf952d962333cef6e061f4d3

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.0.7",
-    "last-sync": "51b19797b71eb355e827d02e3be041ed9ec999b7"
+    "last-sync": "5409cb063df85deaaf952d962333cef6e061f4d3"
 }