Add missing BATTLER_COORD usage

src/battle_anim_poison.c

@@ -193,8 +193,8 @@ static void AnimSludgeProjectile(struct Sprite *sprite)
     InitSpritePosToAnimAttacker(sprite, 1);
 
     sprite->data[0] = gBattleAnimArgs[2];
-    sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, 2);
-    sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, 3);
+    sprite->data[2] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_X_2);
+    sprite->data[4] = GetBattlerSpriteCoord(gBattleAnimTarget, BATTLER_COORD_Y_PIC_OFFSET);
     sprite->data[5] = -30;
 
     InitAnimArcTranslation(sprite);