[MIRROR] Fixes null bullets from being fired after they're deleted (#7102)

* Fixes null bullets from being fired after they're deleted (#38437)

* Adds handle_atom_del check to if deleted bullets are equal to ammo type and chambered round.

* works for me

* Update _box_magazine.dm

* Fixes null bullets from being fired after they're deleted

code/modules/projectiles/gun.dm

@@ -348,7 +348,7 @@
 			var/state = "bayonet"							//Generic state.
 			if(bayonet.icon_state in icon_states('icons/obj/guns/bayonets.dmi'))		//Snowflake state?
 				state = bayonet.icon_state
-			var/icon/bayonet_icons = 'icons/obj/guns/bayonets.dmi' 
+			var/icon/bayonet_icons = 'icons/obj/guns/bayonets.dmi'
 			knife_overlay = mutable_appearance(bayonet_icons, state)
 			knife_overlay.pixel_x = knife_x_offset
 			knife_overlay.pixel_y = knife_y_offset
@@ -528,3 +528,8 @@
 	if(zoomable)
 		azoom = new()
 		azoom.gun = src
+
+/obj/item/gun/handle_atom_del(atom/A)
+	if(A == chambered)
+		chambered = null
+		update_icon()