[birt-dev]CheckIn: Fix UnitTest failure. NPE will be thrown out in the U

["Wei Wang" <wwang@xxxxxxxxxxx>]

Title: [birt-dev]CheckIn: Fix UnitTest failure. NPE will be thrown out in the UnitTest[2.2.0&2.1.3]

- Summary:
NPE will be thrown out due to the operation between blockid and totalDiskBlocks.

- Bugzilla Bug (s) Resolved:
None

- Description:
fix unittest failure.
NPE will be thrown out due to the operation between blockid and totalDiskBlocks.

checkin 2.2.0 and 2.1.3.

- Tests Description  :
Unit Test

- Notes to Build Team:
None

- Notes to Developers:
None

- Notes to QA:  
None

- Notes to Documentation:  
None

- Files Edited:
None

- Files Added:
None

- Files Deleted
None

- Wei Wang
Actuate Software(Shanghai) Co.,Ltd