cras/cras_rclient_message: Heap-use-after-free in cras_fmt_conv_destroy

Detailed report: https://oss-fuzz.com/testcase?key=4889818489159680 Project: cras Fuzzer: aflcrasrclientmessage Fuzz target binary: rclientmessage Job Type: aflasancras Platform Id: linux Crash Type: Heap-use-after-free READ 8 Crash Address: 0x610000005150 Crash State: crasfmtconvdestroy...