Fixes minor color blindness not being curable (#6609)

code/datums/brain_damage/brain_trauma.dm

@@ -14,10 +14,10 @@
 	var/suppressed = 0 //currently being suppressed
 	var/cure_type //type of therapy that cures the trauma
 	//current cures:
-		//hypnosis - cures traumas that alter behavior
-		//solitude - cures traumas that produce hallucination
-		//electroshock - cures traumas that have physical effects
-		//surgery - cures traumas not covered above
+		//CURE_HYPNOSIS - cures traumas that alter behavior
+		//CURE_SOLITUDE - cures traumas that produce hallucination
+		//CURE_CRYSTAL - cures traumas that have physical effects
+		//CURE_SURGERY - cures traumas not covered above
 
 /datum/brain_trauma/New(obj/item/organ/brain/B, _permanent)
 	brain = B

code/datums/brain_damage/mild.dm

@@ -251,6 +251,7 @@
 	scan_desc = "minor damage to the brain's occipital lobe"
 	gain_text = "<span class='warning'>Your perception of color distorts!</span>"
 	lose_text = "<span class='notice'>Your vision returns.</span>"
+	cure_type = CURE_SURGERY
 	var/colorblindedness
 
 /datum/brain_trauma/mild/colorblind/on_gain()