[birt-dev] Checkin: Fix the SWT chart event handler to avoid an exceptio

["Nina Li" <nli@xxxxxxxxxxx>]

- Summary: Fix a NullPointerException generated by SWT renderer in case of "ToggleVisibility" or "URLRedirect" interactivity.

- Bugzilla Bug (s) Resolved: None

- Description:
If the user chooses the SWT renderer, and sets "ToggleVisibility" or "URLRedirect" interactivity, a NullPointerException generates when clicking the chart area.

- Tests Description: N/A

- Files Edited:
/org.eclipse.birt.chart.device.extension/src/org/eclipse/birt/chart/device/swt/SwtEventHandler.java

- Files Added: None

- Notes to Build Team: N/A

- Notes to Developers: N/A

- Notes to QA: N/A

- Notes to Documentation: N/A

Regards,

Nina