[Call for review] Bug - 119954:Application crashed if undo/redo covert nest table to text.

[jane kang]

Hi All,

I completed to fix for the Bug - 119954.
Detail info for issue pls refer to
https://issues.apache.org/ooo/show_bug.cgi?id=119954.Detail infor for patch
pls refer to https://issues.apache.org/ooo/attachment.cgi?id=78339.Isanyone
can help me to reviw?Thanks a lot.