Adds Modifier Armor (#7416)

code/modules/mob/_modifiers/modifiers.dm

@@ -55,6 +55,14 @@
 	var/emp_modifier					// Added to the EMP strength, which is an inverse scale from 1 to 4, with 1 being the strongest EMP. 5 is a nullification.
 	var/explosion_modifier				// Added to the bomb strength, which is an inverse scale from 1 to 3, with 1 being gibstrength. 4 is a nullification.
 
+	// Note that these are combined with the mob's real armor values additatively. You can also omit specific armor types.
+	var/list/armor_percent = null		// List of armor values to add to the holder when doing armor calculations. This is for percentage based armor. E.g. 50 = half damage.
+	var/list/armor_flat = null			// Same as above but only for flat armor calculations. E.g. 5 = 5 less damage (this comes after percentage).
+	// Unlike armor, this is multiplicative. Two 50% protection modifiers will be combined into 75% protection (assuming no base protection on the mob).
+	var/heat_protection = null			// Modifies how 'heat' protection is calculated, like wearing a firesuit. 1 = full protection.
+	var/cold_protection = null			// Ditto, but for cold, like wearing a winter coat.
+	var/siemens_coefficient = null		// Similar to above two vars but 0 = full protection, to be consistant with siemens numbers everywhere else.
+
 	var/vision_flags					// Vision flags to add to the mob. SEE_MOB, SEE_OBJ, etc.
 
 /datum/modifier/New(var/new_holder, var/new_origin)
@@ -186,10 +194,14 @@
 
 // Checks if the mob has a modifier type.
 /mob/living/proc/has_modifier_of_type(var/modifier_type)
+	return get_modifier_of_type(modifier_type) ? TRUE : FALSE
+
+// Gets the first instance of a specific modifier type or subtype.
+/mob/living/proc/get_modifier_of_type(var/modifier_type)
 	for(var/datum/modifier/M in modifiers)
 		if(istype(M, modifier_type))
-			return TRUE
-	return FALSE
+			return M
+	return null
 
 // This displays the actual 'numbers' that a modifier is doing.  Should only be shown in OOC contexts.
 // When adding new effects, be sure to update this as well.