gdal/dxf_fuzzer: Crash in OGRSimpleCurve::getPoint

Project: https://github.com/OSGeo/gdal.git Detailed report: https://oss-fuzz.com/testcase?key=6213050452410368 Project: gdal Fuzzer: libFuzzergdaldxffuzzer Fuzz target binary: dxffuzzer Job Type: libfuzzerubsangdal Platform Id: linux Crash Type: UNKNOWN READ Crash Address: 0xfffffffffffffff0 Cras...