Fix the bug that setting WalkRate=0 on a TechnoType crashed the game (integer divide-by-zero) the moment an object of that type started moving

[DeathFishAtEase]

What kind of change is this?

• New feature, vanilla bugfix or enhancement of a released feature - changelog, docs and credits entries are needed.
• Improvement to a new (unreleased) feature - docs and credits entries are needed; no changelog entry (Skip Changelog).
• Bugfix to a new (unreleased) feature - credits entry is needed; no changelog or docs entries (Skip Changelog, Skip Docs).
• Bugfix to an old (released) feature - changelog and credits entries are needed; no docs entry (Skip Docs).
• Completely minor change (e.g. a typo fix) - no entries are needed (Skip Changelog, Skip Docs, Skip Credits).

Description

WalkRate was introduced in Tiberian Sun; unlike IdleRate, which was newly introduced in Red Alert 2, it does not have zero-value protection (see 0x4DA94A). This is now supplemented to align the semantics: when set to 0, playback will be disabled.

[phoboscn-bot]

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https://www.phoboscn.top/t/topic/751/1

[github-actions]

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[DeathFishAtEase]

Tested by: https://www.phoboscn.top/t/topic/751/2?u=noble_fish