PHP Notice: Undefined index: data

[aonamrata]

Array
(
[offset] => 48
[size] => 10
[data] => 05 - Demo
)
Array
(
[offset] => 66
[size] => 2446
)
PHP Notice: Undefined index: data in mydir\vendor\james-heinrich\getid3\getid3\module.audio-video.riff.php on line 2038

I think we should add an isset or empty check here .

Changes: #423

I could not test all the other things that might be affected. so creating an issue for someone to take a look at the changes.