Sync object event gfx constants

data/maps/Route2_ViridianForest_SouthEntrance/map.json

@@ -16,7 +16,7 @@
   "connections": null,
   "object_events": [
     {
-      "graphics_id": "OBJECT_EVENT_GFX_WOMAN_2",
+      "graphics_id": "OBJ_EVENT_GFX_WOMAN_2",
       "x": 10,
       "y": 6,
       "elevation": 3,
@@ -29,7 +29,7 @@
       "flag": "0"
     },
     {
-      "graphics_id": "OBJECT_EVENT_GFX_WOMAN_1",
+      "graphics_id": "OBJ_EVENT_GFX_WOMAN_1",
       "x": 4,
       "y": 7,
       "elevation": 3,