Removes crit_fail from being an object level variable (#17300)

code/modules/surgery/organs/augments_arms.dm

@@ -171,7 +171,7 @@
 		owner.adjust_fire_stacks(20)
 		owner.IgniteMob()
 		owner.adjustFireLoss(25)
-		crit_fail = 1
+		crit_fail = TRUE
 	else // The gun will still discharge anyway.
 		..()
 

code/modules/surgery/organs/augments_internal.dm

@@ -4,6 +4,7 @@
 	status = ORGAN_ROBOT
 	var/implant_color = "#FFFFFF"
 	var/implant_overlay
+	var/crit_fail = FALSE //Used by certain implants to disable them.
 	tough = TRUE // Immune to damage
 
 /obj/item/organ/internal/cyberimp/New(mob/M = null)