use conventional way of calling static method to please nvcc

diff --git a/include/deal.II/base/thread_management.h b/include/deal.II/base/thread_management.h
index e975b972892d31fad6e5ced97804232fd7d7a5c8..75952bfe593ce49f2ae7aaa110c62be63ebeac00 100644 (file)
--- a/include/deal.II/base/thread_management.h
+++ b/include/deal.II/base/thread_management.h
@@ -2918,7 +2918,7 @@ namespace Threads
       task->set_ref_count (2);
 
       tbb::task *worker = new (task->allocate_child()) TaskEntryPoint<RT>(*this);
-      task->spawn (*worker);
+      tbb::task::spawn (*worker);
     }