fix no-return warning in step-67

diff --git a/examples/step-67/step-67.cc b/examples/step-67/step-67.cc
index 5bbd7e68fd328f3a9799bb9ed19b3b2d0623b27d..86f9862a7b7dd9c986b124931396434f3d3d7d16 100644 (file)
--- a/examples/step-67/step-67.cc
+++ b/examples/step-67/step-67.cc
@@ -209,6 +209,7 @@ namespace Euler_DG
 
         default:
           Assert(false, ExcNotImplemented());
+          return 0.;
       }
   }