[birt-dev] Checkin: fix 131243 fix 131243

["Yuejie Chen" <yuejie.chen@xxxxxxxxxxx>]

- Summary: fix 131243
c.

- Bugzilla Bug (s) Resolved:
131243
- Description:
Now can open a invalid report file, the first page will switch to XML source page, and when switch to other pages, will alert to correct source file first.

- Tests Description:

- Notes to Build Team:

- Notes to Developers:

- Notes to QA:

- Notes to Documentation:

- Files Edited:

/org.eclipse.birt.report.designer.ui.editors.schematic/src/org/eclipse/birt/report/designer/ui/editors/pages/ReportXMLSourceEditorFormPage.java
/org.eclipse.birt.report.designer.ui.editors/src/org/eclipse/birt/report/designer/ui/editors/MultiPageReportEditor.java

- Files Added:

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