libreoffice/pptfuzzer: Crash in __dynamic_cast

Project: git://anongit.freedesktop.org/libreoffice/core Detailed report: https://oss-fuzz.com/testcase?key=6566651324530688 Project: libreoffice Fuzzer: libFuzzerlibreofficepptfuzzer Fuzz target binary: pptfuzzer Job Type: libfuzzerubsanlibreoffice Platform Id: linux Crash Type: UNKNOWN READ Cras...