Reorganizes martial arts and stores them in the MIND.

code/game/objects/items/weapons/implants/implant_krav_maga.dm

@@ -19,7 +19,9 @@
 	var/mob/living/carbon/human/H = imp_in
 	if(!ishuman(H))
 		return
-	if(istype(H.martial_art, /datum/martial_art/krav_maga))
+	if(!H.mind)
+		return
+	if(istype(H.mind.martial_art, /datum/martial_art/krav_maga))
 		style.remove(H)
 	else
 		style.teach(H,1)