Being immune to bonebreaks now makes you immune to delimbs (#5468)

# About the pull request
Being immune to bonebreaks now makes you immune to delimbs
tested on a private server, hit a marine with an HDN stim as a rav on
the feet multiple times, no delimbs, I could just be unlucky though.

# Explain why it's good for the game
You need to cut the bone to delimb somebody, this makes no sense if your
bones are unbreakable.
Its cheesy and unrealistic to bypass HDN (hyperdensificating) by simply
getting lucky and cutting off the entire limb

# Testing Photographs and Procedure
<details>
<summary>Screenshots & Videos</summary>

Put screenshots and videos here with an empty line between the
screenshots and the `<details>` tags.

</details>


# Changelog
:cl:
balance: Being immune to bonebreaks now makes you immune to delimbs.
/:cl:

code/modules/organs/limbs.dm

@@ -365,7 +365,8 @@
 
 	//If limb was damaged before and took enough damage, try to cut or tear it off
 	var/no_perma_damage = owner.status_flags & NO_PERMANENT_DAMAGE
-	if(previous_brute > 0 && !is_ff && body_part != BODY_FLAG_CHEST && body_part != BODY_FLAG_GROIN && !no_limb_loss && !no_perma_damage)
+	var/no_bone_break = owner.chem_effect_flags & CHEM_EFFECT_RESIST_FRACTURE
+	if(previous_brute > 0 && !is_ff && body_part != BODY_FLAG_CHEST && body_part != BODY_FLAG_GROIN && !no_limb_loss && !no_perma_damage && !no_bone_break)
 		if(CONFIG_GET(flag/limbs_can_break) && brute_dam >= max_damage * CONFIG_GET(number/organ_health_multiplier))
 			var/cut_prob = brute/max_damage * 5
 			if(prob(cut_prob))