opencv/imread_fuzzer: Use-of-uninitialized-value in cv::ExrDecoder::readData

Detailed report: https://oss-fuzz.com/testcase?key=5744080958521344 Project: opencv Fuzzer: libFuzzeropencvimreadfuzzer Fuzz target binary: imreadfuzzer Job Type: libfuzzermsanopencv Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: cv::ExrDecoder::readData...