Fix unused variable warnings in step-47

diff --git a/examples/step-47/step-47.cc b/examples/step-47/step-47.cc
index 98cd5b4f073d3aa92d4441229f8976222f8ff019..74b6cdeae8eb202701b6fd26c255cf7ae9bc0a58 100644 (file)
--- a/examples/step-47/step-47.cc
+++ b/examples/step-47/step-47.cc
@@ -152,8 +152,8 @@ namespace Step47
     Assert (values.size() == n_points,
             ExcDimensionMismatch (values.size(), n_points));
 
-    Assert (component == 0,
-            ExcIndexRange (component, 0, 1));
+    (void) component;
+    Assert(component == 0, ExcIndexRange(component, 0, 1));
 
     for (unsigned int i=0; i<n_points; ++i)
       {