libreoffice/xlsfuzzer: Heap-buffer-overflow in rtl_ustr_indexOfChar_WithLength

Project: git://anongit.freedesktop.org/libreoffice/core Detailed report: https://oss-fuzz.com/testcase?key=4524870563004416 Project: libreoffice Fuzzer: libFuzzerlibreofficexlsfuzzer Fuzz target binary: xlsfuzzer Job Type: libfuzzerasanlibreoffice Platform Id: linux Crash Type: Heap-buffer-overfl...