TypesSAXHandler: fix missing clear of levels attribute
TypesSAXHandler: fix missing clear of levels attribute

Without clearing the levels property on the m_temp, also the following parsed
types get the levels accidently.

Fixes: f19ce002b4f2 ("TypeInfo: define levels property")
Signed-off-by: Jan Viktorin <3eab6ac54c005c4408f608556a6663b7f2abede7@fit.vutbr.cz>

BeeeOn/server,BeeeOn/server,BeeeOn/server,BeeeOn/server