af56fe2f5c503326649979415761e9ad394fab5f Fix: `DataTable.ext.classes.…

…thead.row` wouldn't apply to a header row that had been dynamically created by DataTables (only to existing header rows). The same with `.tfoot.row` as well.

DataTables/DataTablesSrc#305

Sync to source repo @af56fe2f5c503326649979415761e9ad394fab5f

datatables.json

@@ -14,5 +14,5 @@
     ],
     "src-repo": "http://github.com/DataTables/DataTablesSrc",
     "last-tag": "2.1.8",
-    "last-sync": "b36b84d58cc245eb0b1509164be6f74f083c1193"
+    "last-sync": "af56fe2f5c503326649979415761e9ad394fab5f"
 }