fix comply error in sequential mode

AMDiS/src/io/Arh2Writer.cc

@@ -21,21 +21,23 @@
 #include "Arh2Writer.h"
 #include "Mesh.h"
 #include "MeshStructure.h"
+#ifdef HAVE_PARALLEL_DOMAIN_AMDIS 
 #include "parallel/StdMpi.h"
+#endif
 
 namespace AMDiS { namespace io {
   
-  using namespace std;
-  using namespace AMDiS::Parallel;
- 
   namespace Arh2Writer
   {
     
 #ifdef HAVE_PARALLEL_DOMAIN_AMDIS 
-    void writeMetaData(Mesh *mesh, string metaFilename)
+    void writeMetaData(Mesh *mesh, std::string metaFilename)
     {
       FUNCNAME("Arh2Writer::writeMetaData()");
       
+      using namespace std;
+      using namespace AMDiS::Parallel;
+      
       int mpiSize = MPI::COMM_WORLD.Get_size();
       vector<std::set<pair<int, int> > > overallData;
       std::set<pair<int, int> > data;