Fixed a memory leak in the datapilot code.
Fixed a memory leak in the datapilot code.

Calc was leaking memory every time the source range of a data pilot
table changes. *sigh*

JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core,JurassicWordExcel/core