Mark some functions as const.

This was caught by cppcheck.

diff --git a/include/deal.II/base/thread_management.h b/include/deal.II/base/thread_management.h
index 75952bfe593ce49f2ae7aaa110c62be63ebeac00..e4da36c37bd2880678d9dede286b11a33038cfd2 100644 (file)
--- a/include/deal.II/base/thread_management.h
+++ b/include/deal.II/base/thread_management.h
@@ -1270,7 +1270,7 @@ namespace Threads
      * an implicit pointer to an object that exists exactly once for each
      * thread, the check is simply to compare these pointers.
      */
-    bool operator == (const Thread &t)
+    bool operator == (const Thread &t) const
     {
       return thread_descriptor == t.thread_descriptor;
     }
@@ -3155,7 +3155,7 @@ namespace Threads
      * an implicit pointer to an object that exists exactly once for each
      * task, the check is simply to compare these pointers.
      */
-    bool operator == (const Task &t)
+    bool operator == (const Task &t) const
     {
       AssertThrow (joinable(), ExcNoTask());
       return task_descriptor == t.task_descriptor;