step-38: fix compilation error with some compilers

git-svn-id: https://svn.dealii.org/trunk@25638 0785d39b-7218-0410-832d-ea1e28bc413d

diff --git a/deal.II/examples/step-38/step-38.cc b/deal.II/examples/step-38/step-38.cc
index 72c85c8787475d36cd86a40106b701704a1152e0..980792100e54014d60784c11d457fe575fc43623 100644 (file)
--- a/deal.II/examples/step-38/step-38.cc
+++ b/deal.II/examples/step-38/step-38.cc
@@ -579,7 +579,7 @@ namespace Step38
                             mapping.get_degree());
 
     std::string filename ("solution-");
-    filename += ('0'+spacedim);
+    filename += '0'+static_cast<char>(spacedim);
     filename += "d.vtk";
     std::ofstream output (filename.c_str());
     data_out.write_vtk (output);