Fix not a HASH reference and fix old code behaviour in Snmp.pm

🦙 MegaLinter status: ⚠️ WARNING

Descriptor	Linter	Files	Fixed	Errors	Elapsed time
✅ ACTION	actionlint	3		0	0.02s
✅ BASH	bash-exec	3		0	0.01s
✅ BASH	shfmt	3	0	0	0.02s
✅ JSON	eslint-plugin-jsonc	3	0	0	1.07s
✅ JSON	jsonlint	3		0	0.27s
✅ JSON	npm-package-json-lint	yes		no	0.39s
✅ JSON	prettier	3	0	0	0.43s
✅ MARKDOWN	markdownlint	5	0	0	0.47s
✅ MARKDOWN	markdown-link-check	5		0	8.28s
✅ MARKDOWN	markdown-table-formatter	5	0	0	0.25s
✅ OPENAPI	spectral	1		0	3.18s
✅ POWERSHELL	powershell	2		0	2.44s
⚠️ POWERSHELL	powershell_formatter	2		2	1.88s
✅ REPOSITORY	dustilock	yes		no	0.01s
✅ REPOSITORY	gitleaks	yes		no	6.16s
✅ REPOSITORY	git_diff	yes		no	0.01s
✅ REPOSITORY	secretlint	yes		no	0.79s
✅ REPOSITORY	syft	yes		no	0.45s
✅ REPOSITORY	trivy	yes		no	3.25s
✅ YAML	prettier	4	0	0	0.64s
✅ YAML	yamllint	4		0	0.32s

See detailed report in MegaLinter reports

You could have the same capabilities but better runtime performances if you use a MegaLinter flavor:

_MegaLinter is graciously provided by _