fix(sinsp): avoid a double free when an exception is thrown #11

Job	Run time
build-libs-emscripten 🧐	4m 3s
build-libs-linux-amd64-asan 🧐	8m 7s
build-libs-linux-amd64-static 🎃	21m 42s
build-libs-linux-amd64 😁 (system_deps)	4m 49s
build-libs-linux-amd64 😁 (bundled_deps)	16m 25s
build-libs-others-amd64 😨 (windows-latest)	8m 10s
build-shared-libs-macos-amd64 😨	3m 1s
build-shared-libs-linux-amd64 🧐	4m 4s
build-libs-linux-amd64 😁 (system_deps_w_chisels)	5m 7s
build-libs-others-amd64 😨 (macos-latest)	8m 15s
build-libs-linux-amd64 😁 (system_deps_minimal)	3m 38s
run-e2e-tests-amd64 (system_deps)	8m 37s
test-libs-static (bundled_deps)	15m 16s
run-e2e-tests-amd64 (bundled_deps)	19m 41s
paths-filter	4s
run-e2e-tests-amd64 (system_deps_w_chisels)	8m 36s
run-e2e-tests-amd64 (asan)	21m 3s
test-scap-x86 😆 (bundled_deps)	8m 55s
test-drivers-x86 😇 (bundled_deps)	12m 27s
build-drivers-s390x 😁 (system_deps)	43m 30s
build-drivers-ppc64le 😁 (system_deps)	49m 22s
	4h 34m 52s

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