poppler/pdf_fuzzer: Use-of-uninitialized-value in clip01

Detailed report: https://oss-fuzz.com/testcase?key=5647387350532096 Project: poppler Fuzzer: libFuzzerpopplerpdffuzzer Fuzz target binary: pdffuzzer Job Type: libfuzzermsanpoppler Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: clip01...