Sync object event gfx constants

data/maps/PalletTown/map.json

@@ -27,7 +27,7 @@
   ],
   "object_events": [
     {
-      "graphics_id": "OBJECT_EVENT_GFX_WOMAN_1",
+      "graphics_id": "OBJ_EVENT_GFX_WOMAN_1",
       "x": 3,
       "y": 10,
       "elevation": 3,
@@ -40,7 +40,7 @@
       "flag": "0"
     },
     {
-      "graphics_id": "OBJECT_EVENT_GFX_FAT_MAN",
+      "graphics_id": "OBJ_EVENT_GFX_FAT_MAN",
       "x": 13,
       "y": 17,
       "elevation": 3,
@@ -53,7 +53,7 @@
       "flag": "0"
     },
     {
-      "graphics_id": "OBJECT_EVENT_GFX_PROF_OAK",
+      "graphics_id": "OBJ_EVENT_GFX_PROF_OAK",
       "x": 10,
       "y": 8,
       "elevation": 3,