[birt-dev] CheckIn, Fix Bug 195781 [Regression]NPE throws out when previ

["ianl" <ianl@xxxxxxxxxxxx>]

-  Summary:
    fixed the bug 195781 [Regression]NPE throws out when preview chart in xls[1203]

-  Bugzilla Bug(s) Resolved: 
    195781

-  Description:  
   Deal with null to avoid NPE be thrown

-  Test Description:     

-   Manual Test.

-  Notes to Build Team: 

-  Notes to Developers: 

-  Notes to QA: 

-  Files Edited:  

/cvsroot/birt/source/org.eclipse.birt.report.engine.emitter.prototype.excel/src/org/eclipse/birt/report/engine/emitter/excel/chart/ChartConverter.java

-  Files Added:

Attachment: man_002.gif
Description: GIF image