Add mapthing scale support

The fields scale, scalex and scaley set the only mapthing scale field alike, since SRB2 currently does not support independent X/Y scaling yet.

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• 67acb6e4 - Add Lua support.

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• beb42c94 - Move the scale setting code behind the MapthingSpawn hook.

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added 1 commit

• 1e4eab77 - Use fixed_t on the mapthing scale for the sake of coherence.

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merged

mentioned in commit f4c2d70c