Issue 24530 in oss-fuzz: assimp:assimp_fuzzer: Integer-overflow in Assimp::strtol10

[kimkulling]

Describe the bug
New issue 24530 by ClusterFuzz-External: assimp:assimp_fuzzer: Integer-overflow in Assimp::strtol10
https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=24530

To Reproduce
Detailed Report: https://oss-fuzz.com/testcase?key=5191554273378304

Project: assimp
Fuzzing Engine: libFuzzer
Fuzz Target: assimp_fuzzer
Job Type: libfuzzer_ubsan_assimp
Platform Id: linux

Crash Type: Integer-overflow
Crash Address:
Crash State:
Assimp::strtol10
Assimp::DXF::LineReader::operator++
Assimp::DXFImporter::InternReadFile

Sanitizer: undefined (UBSAN)

Crash Revision: https://oss-fuzz.com/revisions?job=libfuzzer_ubsan_assimp&revision=202007300626

Reproducer Testcase: https://oss-fuzz.com/download?testcase_id=5191554273378304

Issue filed automatically.

See https://google.github.io/oss-fuzz/advanced-topics/reproducing for instructions to reproduce this bug locally.
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Expected behavior
No crash

Desktop (please complete the following information):

• Linux