Fix properly memory issues
Fix properly memory issues

It is WPXInputStream::getDocumentOLEStream(...) that allocates the memory.
The data pointer is managed by the WPXInputStream internally.

sdteffen/libvisio,LibreOffice/libvisio,sdteffen/libvisio,sdteffen/libvisio,LibreOffice/libvisio,sdteffen/libvisio,LibreOffice/libvisio