Shield Update Fix (#1501)

* Update shield.dm

* Update shield.dm

code/game/objects/items/ego_weapons/subtype/shield.dm

@@ -90,10 +90,10 @@
 		block = TRUE
 		block_success = FALSE
 		shield_user.physiology.armor = shield_user.physiology.armor.modifyRating(bomb = 1) //bomb defense must be over 0
-		shield_user.physiology.red_mod *= (1 - ((reductions[1]) / 100))
-		shield_user.physiology.white_mod *= (1 - ((reductions[2]) / 100))
-		shield_user.physiology.black_mod *= (1 - ((reductions[3]) / 100))
-		shield_user.physiology.pale_mod *= (1 - ((reductions[4]) / 100))
+		shield_user.physiology.red_mod *= max(0.001, (1 - ((reductions[1]) / 100)))
+		shield_user.physiology.white_mod *= max(0.001, (1 - ((reductions[2]) / 100)))
+		shield_user.physiology.black_mod *= max(0.001, (1 - ((reductions[3]) / 100)))
+		shield_user.physiology.pale_mod *= max(0.001, (1 - ((reductions[4]) / 100)))
 		RegisterSignal(user, COMSIG_MOB_APPLY_DAMGE, .proc/AnnounceBlock)
 		if(cleaning)
 			DisableBlock(shield_user)
@@ -105,10 +105,10 @@
 //Ends the block, causes you to take more damage for as long as debuff_duration if you did not block any damage
 /obj/item/ego_weapon/shield/proc/DisableBlock(mob/living/carbon/human/user)
 	user.physiology.armor = user.physiology.armor.modifyRating(bomb = -1)
-	user.physiology.red_mod /= (1 - ((reductions[1]) / 100))
-	user.physiology.white_mod /= (1 - ((reductions[2]) / 100))
-	user.physiology.black_mod /= (1 - ((reductions[3]) / 100))
-	user.physiology.pale_mod /= (1 - ((reductions[4]) / 100))
+	user.physiology.red_mod /= max(0.001, (1 - ((reductions[1]) / 100)))
+	user.physiology.white_mod /= max(0.001, (1 - ((reductions[2]) / 100)))
+	user.physiology.black_mod /= max(0.001, (1 - ((reductions[3]) / 100)))
+	user.physiology.pale_mod /= max(0.001, (1 - ((reductions[4]) / 100)))
 
 	UnregisterSignal(user, COMSIG_MOB_APPLY_DAMGE)
 	deltimer(parry_timer)