created an attachment (id=157859)
zip file

steps to reproduce:
1. edit attached report's xml data source path to attached xml file path
2. preview in xls and open it

expected result:
display table without error

actual result:see attached.
excel has a limit:
the text in the cell should have a length within 32767.
in this report, the longest text length is 39829. and it needs to be truncated.
truncated the text length and log a waring. fixed.
verified in build 2.6.0.v20100311
created an attachment (id=163879)
xml