--- a/Lib/IMPL/DOM/Navigator.pm	Thu Oct 11 20:11:45 2012 +0400
+++ b/Lib/IMPL/DOM/Navigator.pm	Fri Oct 12 02:08:51 2012 +0400
@@ -47,7 +47,7 @@
             my @alternatives = $current->selectNodes($query);
             
             unless (@alternatives) {
-                $current = $this->advanceNavigator or return undef;
+                $current = $this->advanceNavigator or return;
                 @alternatives = $current->selectNodes($query);
             }
             
@@ -60,7 +60,7 @@
             
             $node = $alternatives[0];
         } else {
-            return undef;
+            return;
         }
     }
     
@@ -103,13 +103,13 @@
         if ( exists $this->{$_state}{query} ) {
             my $query = $this->{$_state}{query};
   
-            $this->Back or return undef; # that meams the end of the history
+            $this->Back or return; # that meams the end of the history
 
             undef while ( $this->advanceNavigator and not $this->Navigate($query));
 
             return $this->Current;
         }
-        return undef;
+        return;
     }
     
     return $this->Current;
@@ -142,7 +142,7 @@
         }
         $this->Current if defined wantarray;
     } else {
-        return undef;
+        return;
     }
 }
 
@@ -165,7 +165,7 @@
     if (my $state = $this->{$_path} ? $this->{$_path}->[$index] : undef ) {
         return $state->{alternatives}[$state->{current}]
     } else {
-        return undef;
+        return;
     }
 }
 
@@ -220,7 +220,7 @@
     
     if ($@) {
         $this->restoreState();
-        return undef;
+        return;
     } else {
         $this->applyState();
         return $result;