fix bug in shift_left

git-svn-id: https://dng.biozentrum.unibas.ch/svn/openstructure/trunk@2496 5a81b35b-ba03-0410-adc8-b2c5c5119f08

modules/io/src/mol/pdb_writer.cc

@@ -39,12 +39,14 @@ namespace {
 bool shift_left(const String& atom_name, bool is_hetatm, 
                 const String& element, float mass) 
 {
+  if (atom_name.length()==4) {
+    return true;
+  }
   if (is_hetatm==false) {
     return false;
   }
 
-  if (isdigit(atom_name[0]) || atom_name=="UNK" ||
-      atom_name.length()==4) {
+  if (isdigit(atom_name[0]) || atom_name=="UNK") {
     return true;
   }
   if (mass>34) {