OSV-2022-808 Use-of-uninitialized-value in _dbus_marshal_write_basic

OSS-Fuzz report: https://bugs.chromium.org/p/oss-fuzz/issues/detail?id=50762 Crash type: Use-of-uninitialized-value Crash state: dbusmarshalwritebasic dbustypewriterwritebasic writebasicfield...