Merge pull request #608 from Kabramen/prosthetic-limb-quirk-revamp

Ports selectable prostethic limbs from Yog + quirk blacklist and two o…

code/modules/client/preferences.dm

@@ -1515,6 +1515,12 @@ GLOBAL_LIST_EMPTY(preferences_datums)
 				var/quirk = href_list["trait"]
 				if(!SSquirks.quirks[quirk])
 					return
+				for(var/V in SSquirks.quirk_blacklist) //V is a list
+					var/list/L = V
+					for(var/Q in all_quirks)
+						if((quirk in L) && (Q in L) && !(Q == quirk)) //two quirks have lined up in the list of the list of quirks that conflict with each other, so return (see quirks.dm for more details)
+							to_chat(user, "<span class='danger'>[quirk] is incompatible with [Q].</span>")
+							return
 				var/value = SSquirks.quirk_points[quirk]
 				if(value == 0)
 					if(quirk in neutral_quirks)