Update items.cfg

port changes from SotBEEE over to here, see cooljeanius/Son_Of_The_Black_Eye_Easy_Edition@74c91d3 which was done for cooljeanius/Son_Of_The_Black_Eye_Easy_Edition#15
This is for nemaara/A_New_Order#34

macros/items.cfg

@@ -17,7 +17,7 @@
             [/not]
         [/filter_wml]
     ) items/snowshoes.png
-    #po: Unlike in SotBEEE, we can't assume gender here, so word this in a gender-neutral fashion:
+    #po: We can't assume gender here, so word this in a gender-neutral fashion:
     _"$unit.name finds some snowshoes. Put them on?"
     _"snowshoes^Take them"
     _"snowshoes^Leave them"
@@ -29,6 +29,22 @@
             image=items/snowshoes.png
             description= _ "Snowshoes grant their wearers greater mobility on frozen terrain, such as snow!"
             duration=forever
+            [filter]
+                x,y={X},{Y}
+            [/filter]
+            [then]
+                [modify_unit]
+                    [filter]
+                        x,y={X},{Y}
+                    [/filter]
+
+                    [trait]
+                        id=snow_shoes
+                        name= _ "snowshoes"
+                        description= _ "The snowshoes allow movement on frozen terrain."
+                    [/trait]
+                [/modify_unit]
+            [/then]
             [effect]
                 apply_to=movement_costs
                 replace=true