Change rangeX and rangeY to u8 in ObjectEvent struct

Author: NTx86

include/global.fieldmap.h

@@ -229,8 +229,8 @@ struct ObjectEvent
              u16 movementDirection:4;
              struct __attribute__((packed))
              {
-                u16 rangeX:4;
-                u16 rangeY:4;
+                u8 rangeX:4;
+                u8 rangeY:4;
              } range;
     /*0x1A*/ u8 fieldEffectSpriteId;
     /*0x1B*/ u8 warpArrowSpriteId;