skia/image_filter_deserialize: Use-of-uninitialized-value in BluntJoiner

Project: https://skia.googlesource.com/skia.git Detailed report: https://oss-fuzz.com/testcase?key=5406272879853568 Project: skia Fuzzer: libFuzzerskiaimagefilterdeserialize Fuzz target binary: imagefilterdeserialize Job Type: libfuzzermsanskia Platform Id: linux Crash Type:...