Skeletons that transform into stray sometimes get new armor

When skeletons turn into strey while in powdery snow, they may have armor on them, although the skeletons did not have it. 

Instructions for reproducing

1. Make sure that the skeleton ends up in powdered snow

2. Wait for the skeleton to turn into a stray

Expected result: stray has the same things that the skeleton had

Visible result: stray may have armor that was not on the skeleton