tdf#89750: svx: fix ExternalToolEdit on Windows
tdf#89750: svx: fix ExternalToolEdit on Windows

While adding check that the temp file move succeeds, overlooked that the
file handle is actually leaked, which means the move will fail on WNT
because the file is already open.

(regression from ef490df2119523e1761f99b5fdbb387c2c71608d)

Change-Id: I779ccde79871930fef3bad7e17b633fb62e36a46

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