[birt-dev] CheckIN:Fix bugzilla bug 190513Null-pointer exception when ed

["Mingxia Wu" <mwu@xxxxxxxxxxx>]

- Summary:
Fix bugzilla bug 190513 Null-pointer exception when editing existing property bindings in 2.2RC0.(in HEAD)

- Bugzilla Bug (s) Resolved:
190513

- Description:

The report kept none exist property binding due to the former change in ODA. After ODA has fixed this error, the newly report won’t keep this none exist properties anymore. Anyway, we should handle this NPE even for this invalid report file. Fix it now!

- Tests Description:

- Notes to Build Team:

- Notes to Developers:

- Notes to QA:  

- Notes to Documentation:  

- Files Edited:
"/org.eclipse.birt.report.designer.ui/src/org/eclipse/birt/report/designer/data/ui/datasource/PropertyBindingPage.java"

- Files Added:

- Files Deleted