sqlite3/ossfuzz: Use-of-uninitialized-value in accessPayload

Detailed report: https://oss-fuzz.com/testcase?key=5707266847670272 Project: sqlite3 Fuzzer: libFuzzersqlite3ossfuzz Fuzz target binary: ossfuzz Job Type: libfuzzermsansqlite3 Platform Id: linux Crash Type: Use-of-uninitialized-value Crash Address: Crash State: accessPayload vdbeMemFromBtreeResiz...