Mech armour provides no protection from simple mobs

[githubuser4141]

Description of issue

Exosuit/Mech armour doesn't work if the mech is attacked by a simple mob. (Carp, Pike, Xeno, whatever...) Exosuits will receive full damage as if their armour had "0" melee defense.

Difference between expected and actual behavior

Expected: Mechs shouldn't be taking a full 15/25 damage from mobs if they have high melee resistance (They do. The lowest melee stat is 65% protection.)

Happened: Mechs, regardless of their actual armour, take the full damage from any simple mob attack.

Steps to reproduce

1. Spawn a heavy combat mech (or any mech, actually.)
2. Find a hostile simple mob or spawn one, note it's damage and the mech's melee armour.
3. Let the mob attack the mech while checking it's health vars. Notice how the mech is receiving the full damage.

Length of time in which bug has been known to occur

Unknown, it's also a bug on other servers derived from ancient baycode (e.g. CEV Eris)

Issue bingo

• Issue could be reproduced at least once
• Issue could be reproduced by different players
• Issue could be reproduced in multiple rounds
• Issue happened in a recent (less than 7 days ago) round
• Couldn't find an existing issue about this

[githubuser4141]

I hope this'll be seen to soonish since we've added xenomorphs and there's actually a damn reason to build mechs. (Isn't the whole purpose of mechs in SS13 to fight simple mobs/animals with em? smh)