Fix a line preventing the echo example from compiling.

[delp]

Summary

Function returning 2 vals was in-line. Scooted it up and checked its error.

Type of change

• feat (new behavior)
• fix (bug fix)
• refactor / chore / docs / test / ci / perf / build

Checklist

• task prepush or task check passes locally
• CHANGELOG.md updated for user-facing changes
• COMPATIBILITY.md updated for wire, RPC, or Python RNS parity changes
• Tests added or updated for behavior changes
• PR title follows Conventional Commits (type(scope): summary)
• Every commit signed off (git commit -s, DCO)
• Commits signed when practical (git commit -S or gitsign)

RSM / inventory

• [x ] Not applicable (no inventory paths changed)
• reticulum-go.rsm updated via hook or task tree-rsm-sign
• Skipped intentionally (SKIP_TREE_RSM_HOOK=1) with reason below

Test plan

I just checked that this fixes the compile issue.

[Sudo-Ivan]

Looks good thanks!