- avoid fixity- and size check if files does not exist

deep_fixitycheck.pl

@@ -322,10 +322,12 @@ if (defined $search_dir && -d "$search_dir") {
         my $result;
         $result->{errors} = 0;
         $result = check_if_file_exist($fileobj, $result);
-        $result = check_file_size($fileobj, $result);
-        foreach my $fixity_algorithm ( @algorithms) {
-          if ($fileobj->{fixity}->{$fixity_algorithm}) {
-            $result = check_file_fixity($fileobj, $result, $fixity_algorithm);
+        if ($result->{exist}) { # only if file exists, do additional checks
+          $result = check_file_size($fileobj, $result);
+          foreach my $fixity_algorithm (@algorithms) {
+            if ($fileobj->{fixity}->{$fixity_algorithm}) {
+              $result = check_file_fixity($fileobj, $result, $fixity_algorithm);
+            }
           }
         }
         if ($result->{errors} > 0) {