Refactors landmines

Replaced the minepayload var and the switch() in triggermine() with a
proc for the mine's effect.
Removed unnessecary New() proc.
Removed the existing uglymine icon state and renamed uglyminearmed to
uglymine.

code/game/objects/effects/mines.dm

@@ -6,11 +6,10 @@
 	layer = 3
 	icon = 'icons/obj/weapons.dmi'
 	icon_state = "uglymine"
-	var/minepayload = "explosive"
 	var/triggered = 0
 
-/obj/effect/mine/New()
-	icon_state = "uglyminearmed"
+/obj/effect/mine/proc/mineEffect(mob/victim)
+	explosion(loc, 0, 1, 2, 3)
 
 /obj/effect/mine/Crossed(AM as mob|obj)
 	if(isanimal(AM))
@@ -24,48 +23,42 @@
 
 	if(triggered) return
 	visible_message("<span class='danger'>[AM] sets off \icon[src] [src]!</span>")
-	triggermine(AM, minepayload)
+	triggermine(AM)
 
-/obj/effect/mine/proc/triggermine(mob/victim, var/triggertype)
+/obj/effect/mine/proc/triggermine(mob/victim)
 	var/datum/effect/effect/system/spark_spread/s = new /datum/effect/effect/system/spark_spread
 	s.set_up(3, 1, src)
 	s.start()
-
-	switch(triggertype)
-		if("explosive")
-			explosion(loc, 0, 1, 2, 3)
-		if("triggerkick")
-			if(isliving(victim) && victim.client)
-				victim << "<font color='red'><b>You have been kicked FOR NO REISIN!<b></font>"
-				del(victim.client)
-		if("triggerplasma")
-			atmos_spawn_air(SPAWN_TOXINS, 360)
-		if("triggern2o")
-			atmos_spawn_air(SPAWN_N2O, 360)
-		if("triggerstun")
-			if(isliving(victim))
-				victim.Weaken(8)
-
-
+	mineEffect(victim)
 	triggered = 1
 	qdel(src)
 
+
 /obj/effect/mine/plasma
 	name = "plasma mine"
-	icon_state = "uglymine"
-	minepayload = "triggerplasma"
+
+/obj/effect/mine/plasma/mineEffect(mob/victim)
+	atmos_spawn_air(SPAWN_TOXINS, 360)
+
 
 /obj/effect/mine/n2o
 	name = "\improper N2O mine"
-	icon_state = "uglymine"
-	minepayload = "triggern2o"
+
+/obj/effect/mine/n2o/mineEffect(mob/victim)
+	atmos_spawn_air(SPAWN_N2O, 360)
+
 
 /obj/effect/mine/stun
 	name = "stun mine"
-	icon_state = "uglymine"
-	minepayload = "triggerstun"
+
+/obj/effect/mine/stun/mineEffect(mob/victim)
+	if(isliving(victim))
+		victim.Weaken(8)
 
 /obj/effect/mine/kickmine
 	name = "kick mine"
-	icon_state = "uglymine"
-	minepayload = "triggerkick"
+
+/obj/effect/mine/kickmine/mineEffect(mob/victim)
+	if(isliving(victim) && victim.client)
+		victim << "<font color='red'><b>You have been kicked FOR NO REISIN!<b></font>"
+		del(victim.client)