Avoid a warning in release mode.

diff --git a/source/lac/slepc_solver.cc b/source/lac/slepc_solver.cc
index ea91456bce363dc4568c8c6c27a95a196f03c14b..e7f434c5f2ade4282cc15dc79798c6dd0cf26d8e 100644 (file)
--- a/source/lac/slepc_solver.cc
+++ b/source/lac/slepc_solver.cc
@@ -68,6 +68,7 @@ namespace SLEPcWrappers
 #else
         const PetscErrorCode ierr = EPSDestroy (&eps);
 #endif
+        (void)ierr;
         AssertNothrow (ierr == 0, ExcSLEPcError(ierr));
       }
   }