gdal: Negative-size-param in DDFSubfieldDefn::ExtractStringData

Project: https://github.com/OSGeo/gdal.git Detailed report: https://oss-fuzz.com/testcase?key=5663860470054912 Project: gdal Fuzzer: libFuzzergdalogrsdtsfuzzer Fuzz target binary: ogrsdtsfuzzer Job Type: libfuzzerasangdal Platform Id: linux Crash Type: Negative-size-param Crash Address: Crash...