libreoffice:ww2fuzzer: Bad-cast to SwClient from invalid vptr in SwDoc::ChgPageDesc

Project: git://anongit.freedesktop.org/libreoffice/core Detailed Report: https://oss-fuzz.com/testcase?key=5521351386464256 Project: libreoffice Fuzzing Engine: libFuzzer Fuzz Target: ww2fuzzer Job Type: libfuzzerubsanlibreoffice Platform Id: linux Crash Type: Bad-cast Crash Address: 0x0000174f01...