Memory leak in TUPCEANExtension5Support.decodeRow

After apply #145 and like TUPCEANExtension2Support.decodeRow:

file: ZXing.OneD.UPCEANExtension5Support
line: 123

current:

```
  if (extensionData <> nil)
  then
     extensionResult.putAllMetadata(extensionData);
```

should be:

```
  if (extensionData <> nil) then
  begin
    extensionResult.putAllMetadata(extensionData);
    FreeAndNil(extensionData);
  end;
```