Fix trap's trigger_weight being ignored if less than 500g

[BrettDong]

Summary

SUMMARY: Bugfixes "Fix trap's trigger_weight being ignored if less than 500g"

Purpose of change

The code block for triggering a trap by item is only entered when item weight is greater than 500 grams. Hence trigger_weight JSON field is not respected when its value is less than 500 grams, e.g. bear traps whose trigger_weight is 200 grams.

Fix #41538.

Describe the solution

Move the code block out from the branch whose condition is item weight greater than 500 grams.

Describe alternatives you've considered

None yet.

Testing

1. Deploy a bear trap
2. Throw a pebble (100 grams) to the trap and the trap is not triggered.
3. Throw a cellphone (270 grams) to the trap and the trap is triggered.
4. Throw a laptop (3.32 kg) to the trap and the trap is triggered.

However, in master branch version, throwing a cellphone (270 grams) does not trigger the bear trap, which disobeys trigger_weight of bear traps.