Fix floating point divide by zero in game::update_overmap_seen #36876
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ifreund
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<Bugfix>
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Summary
SUMMARY: Bugfixes "Fix floating point divide by zero in game::update_overmap_seen"
Purpose of change
Fixes #36809 - when is delta is zero calculating multiplier in update_overmap_seen was causing division by zero because max(0, 0) == 0
Describe the solution
Skip the case delta == point_zero.
It is already handled before the loop.
Describe alternatives you've considered
Testing
Additional context