libreoffice/pptfuzzer: Bad-cast to const XLineStartItem from XLineEndItem;EnhancedCustomShape2d::SwapStartAndEndArrow;CorrectCalloutArrows

Project: git://anongit.freedesktop.org/libreoffice/core Detailed report: https://oss-fuzz.com/testcase?key=5550802748833792 Project: libreoffice Fuzzer: libFuzzerlibreofficepptfuzzer Fuzz target binary: pptfuzzer Job Type: libfuzzerubsanlibreoffice Platform Id: linux Crash Type: Bad-cast Crash...