wasm: Plug a resource leak on exception (CID 508177)

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Testing Before we can approve your change; please submit the following in a comment:

[ ] Example configuration file for the change
[ ] Debug log output from testing the change
[ ] Attached Valgrind output that shows no leaks or memory corruption was found

If this is a change to packaging of containers or native binaries then please confirm it works for all targets.

[ ] Run local packaging test showing all targets (including any new ones) build.
[ ] Set ok-package-test label to test for all targets (requires maintainer to do).

Documentation

[ ] Documentation required for this feature

Backporting

[ ] Backport to latest stable release.

Fluent Bit is licensed under Apache 2.0, by submitting this pull request I understand that this code will be released under the terms of that license.

fluent / fluent-bit

wasm: Plug a resource leak on exception (CID 508177) #9615