Add necessary include guard.

git-svn-id: https://svn.dealii.org/trunk@21176 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/tests/lac/is_block_vector.cc b/tests/lac/is_block_vector.cc
index f46b6c4dec3e4ec8aa9b2ced305bfee270a74c99..406ab868db3e664c059e83fba0cb18d4f9d4eb1b 100644 (file)
--- a/tests/lac/is_block_vector.cc
+++ b/tests/lac/is_block_vector.cc
@@ -19,6 +19,7 @@
 #include <fstream>
 #include <iomanip>
 #include <algorithm>
+#include <iostream>