fix: make px crops export at a deterministic size - #35

Check warning on line 473 in src/main/java/com/flowingcode/vaadin/addons/imagecrop/ImageCrop.java

sonarqubecloud / SonarCloud Code Analysis

Return an empty array instead of null.

See more on https://sonarcloud.io/project/issues?id=FlowingCode_ImageCrop&issues=AaDFmbFNHZu8vVuWicP8&open=AaDFmbFNHZu8vVuWicP8&pullRequest=35