Revert "what would this class need virt. dtor for?"
Revert "what would this class need virt. dtor for?"

mingw gcc apparently wants it...

This reverts commit e13d0953204979d7a80549ae83c237dd173b428c.

Conflicts:
	src/lib/KN2ParserUtils.cpp

freedesktop-unofficial-mirror/libreoffice__libetonyek,freedesktop-unofficial-mirror/libreoffice__libetonyek,LibreOffice/libetonyek,freedesktop-unofficial-mirror/libreoffice__libetonyek,LibreOffice/libetonyek,LibreOffice/libetonyek