Fix vcam_enum_framesizes to enumerate all sizes when scaling is enabled

[davidzwei]

When scaling is enabled, vcam_enum_framesizes only returned one frame size because the index guard was never updated after the branch was changed. The original else block also became unreachable dead code.

Fix by removing the dead code and enumerating vcam_sizes[] by index.

---

Summary by cubic

Fixes vcam_enum_framesizes to return all discrete frame sizes when scaling is enabled, instead of only one. Cleans up dead code and adds a proper bounds check.

• Bug Fixes
  • Enumerates vcam_sizes by index to set each discrete size.
  • Replaces fsize->index > 0 with >= ARRAY_SIZE(vcam_sizes) and removes the unreachable stepwise branch.

^{Written for commit c069436. Summary will update on new commits. Review in cubic}

[cubic-dev-ai]

No issues found across 1 file

_{Re-trigger cubic}

[jserv]

Read https://cbea.ms/git-commit/ carefully and enforce the rules.

[jserv]

Provide test cases to reproduce.