More projectiles now ignite things

code/modules/projectiles/projectile.dm

@@ -49,6 +49,7 @@
 		//Effects
 	var/incendiary = 0 //1 for ignite on hit, 2 for trail of fire. 3 maybe later for burst of fire around the impact point. - Mech
 	var/flammability = 0 //Amount of fire stacks to add for the above.
+	var/combustion = TRUE	//Does this set off flammable objects on fire/hit?
 	var/stun = 0
 	var/weaken = 0
 	var/paralyze = 0
@@ -90,6 +91,10 @@
 //called when the projectile stops flying because it collided with something
 /obj/item/projectile/proc/on_impact(var/atom/A)
 	impact_effect(effect_transform)		// generate impact effect
+	if(damage && damage_type == BURN)
+		var/turf/T = get_turf(A)
+		if(T)
+			T.hotspot_expose(700, 5)
 	return
 
 //Checks if the projectile is eligible for embedding. Not that it necessarily will.
@@ -132,6 +137,9 @@
 	if (!istype(targloc) || !istype(curloc))
 		return 1
 
+	if(combustion)
+		curloc.hotspot_expose(700, 5)
+
 	if(targloc == curloc) //Shooting something in the same turf
 		target.bullet_act(src, target_zone)
 		on_impact(target)