libreoffice/pngfuzzer: Container-overflow in BitmapColor::GetBlue

Project: git://anongit.freedesktop.org/libreoffice/core Detailed report: https://oss-fuzz.com/testcase?key=5533260961546240 Project: libreoffice Fuzzer: libFuzzerlibreofficepngfuzzer Fuzz target binary: pngfuzzer Job Type: libfuzzerasanlibreoffice Platform Id: linux Crash Type: Container-overflow...