Fixes energy shields and energy swords blocking everything regardless of block chance. (#21278)

1. When a human is hit by a bullet, check_shields() is called. If a
value different from BULLET_ACT_HIT is returned, the shield will void
the bullet.
2. In turn, check_shield() calls handle_shield() on the held shield.
3. whoever coded this shit forgot to add a default return value so the
held shield returns null when it fails to block meaning that the game
voids the bullet lol

Co-authored-by: Matt Atlas <liermattia@gmail.com>

code/game/objects/items/weapons/melee/energy.dm

@@ -118,6 +118,8 @@
 					if(prob(reflectchance))
 						user.visible_message(SPAN_DANGER("\The [user] blocks [attack_text] with \the [src]!"))
 						return BULLET_ACT_BLOCK
+			else
+				return BULLET_ACT_HIT
 
 /obj/item/melee/energy/get_print_info()
 	. = ..()

code/game/objects/items/weapons/shields.dm

@@ -221,7 +221,8 @@
 		else
 			user.visible_message(SPAN_DANGER("\The [user] blocks [attack_text] with \the [src]!"))
 			return BULLET_ACT_BLOCK
-
+	else
+		return BULLET_ACT_HIT
 
 /obj/item/shield/energy/get_block_chance(mob/user, damage, atom/damage_source = null, mob/attacker = null)
 	if(isprojectile(damage_source))