libreoffice/mmlfuzzer: Bad-cast to SmXMLImport from SvXMLImport in SmXMLImportContext::GetSmImport

Project: git://anongit.freedesktop.org/libreoffice/core Detailed report: https://oss-fuzz.com/testcase?key=5722250335485952 Project: libreoffice Fuzzer: libFuzzerlibreofficemmlfuzzer Fuzz target binary: mmlfuzzer Job Type: libfuzzerubsanlibreoffice Platform Id: linux Crash Type: Bad-cast Crash...