dlplibs: Index-out-of-bounds in WKS4Chart::updateChart

Detailed report: https://oss-fuzz.com/testcase?key=4881481551839232 Project: dlplibs Fuzzer: libFuzzerdlplibswdbfuzzer Fuzz target binary: wdbfuzzer Job Type: libfuzzerubsandlplibs Platform Id: linux Crash Type: Index-out-of-bounds Crash Address: Crash State: WKS4Chart::updateChart...