Runtime and MC crash fixes

code/modules/projectiles/firing.dm

@@ -4,7 +4,7 @@
 		var/curloc = user.loc
 		var/targloc = get_turf(target)
 		ready_proj(target, user, quiet, zone_override)
-		if(distro)
+		if(distro && targloc)
 			targloc = spread(targloc, curloc, distro)
 		if(!throw_proj(target, targloc, user, params))
 			return 0

code/modules/projectiles/gun.dm

@@ -36,6 +36,7 @@
 	var/sawn_state = SAWN_INTACT
 	var/burst_size = 1					//how large a burst is
 	var/fire_delay = 0					//rate of fire for burst firing and semi auto
+	var/firing_burst = 0				//Prevent the weapon from firing again while already firing
 	var/semicd = 0						//cooldown handler
 	var/weapon_weight = WEAPON_LIGHT
 
@@ -135,6 +136,8 @@
 
 
 /obj/item/weapon/gun/afterattack(atom/target, mob/living/user, flag, params)
+	if(firing_burst)
+		return
 	if(flag) //It's adjacent, is the user, or is on the user's person
 		if(target in user.contents) //can't shoot stuff inside us.
 			return
@@ -210,6 +213,7 @@ obj/item/weapon/gun/proc/newshot()
 			recoil = initial(recoil)
 
 	if(burst_size > 1)
+		firing_burst = 1
 		for(var/i = 1 to burst_size)
 			if(!user)
 				break
@@ -231,6 +235,7 @@ obj/item/weapon/gun/proc/newshot()
 			process_chamber()
 			update_icon()
 			sleep(fire_delay)
+		firing_burst = 0
 	else
 		if(chambered)
 			if(!chambered.fire(target, user, params, , suppressed, zone_override))

code/modules/projectiles/guns/projectile/rechargable_magazine.dm

@@ -81,6 +81,7 @@
 					return
 				update_icon()
 				gun.forceMove(user)
+				user.update_inv_back()
 		else
 			user << "<span class='warning'>You are already holding the gun!</span>"
 	else
@@ -125,7 +126,6 @@
 	else
 		icon_state = "holstered"
 
-
 /obj/item/weapon/minigunpack/proc/attach_gun(var/mob/user)
 	if(!gun)
 		gun = new(src)
@@ -136,6 +136,7 @@
 	else
 		src.visible_message("<span class='warning'>The [gun.name] snaps back onto the [name]!</span>")
 	update_icon()
+	user.update_inv_back()
 
 
 /obj/item/weapon/gun/projectile/minigun
@@ -151,7 +152,7 @@
 	w_class = 5
 	materials = list()
 	burst_size = 5
-	fire_delay = 2
+	fire_delay = 1
 	weapon_weight = WEAPON_HEAVY
 	fire_sound = 'sound/weapons/Laser.ogg'
 	mag_type = /obj/item/ammo_box/magazine/internal/minigun