Fix in DUMPATOMS

File was open in a manner that do not provide autobck

src/generic/DumpAtoms.cpp

@@ -103,7 +103,7 @@ DumpAtoms::DumpAtoms(const ActionOptions&ao):
   checkRead();
   if(file.length()==0) error("name out output file was not specified");
   of.link(*this);
-  of.open(file.c_str(),"w");
+  of.open(file.c_str());
   log.printf("  printing the following atoms in %s :", unitname.c_str() );
   for(unsigned i=0;i<atoms.size();++i) log.printf(" %d",atoms[i].serial() );
   log.printf("\n");