ClassCastException when saving a gephi file after PDF export

[mbastian]

Way to reproduce:

1. Open sample graph
2. Export PDF
3. Try to save project file

Stack trace:
java.lang.ClassCastException: com.itextpdf.text.Rectangle cannot be cast to java.awt.Rectangle
at org.netbeans.beaninfo.editors.RectangleEditor.getValues(RectangleEditor.java:64)
at org.netbeans.beaninfo.editors.ArrayOfIntSupport.getAsText(ArrayOfIntSupport.java:132)
at org.netbeans.beaninfo.editors.RectangleEditor.getAsText(RectangleEditor.java:56)
at org.gephi.preview.PreviewModelImpl.getValueAsText(PreviewModelImpl.java:379)
at org.gephi.preview.PreviewModelImpl.writeXML(PreviewModelImpl.java:288)
at org.gephi.preview.PreviewPersistenceProvider.writeXML(PreviewPersistenceProvider.java:63)
at org.gephi.project.io.GephiWriter.writeWorkspaceChildren(GephiWriter.java:171)
at org.gephi.project.io.GephiWriter.writeWorkspace(GephiWriter.java:162)
at org.gephi.project.io.GephiWriter.writeProject(GephiWriter.java:143)
at org.gephi.project.io.GephiWriter.writeAll(GephiWriter.java:88)