Fix flying dolphin (extra_mobs)

mods/ENTITIES/extra_mobs/dolphin.lua

@@ -39,8 +39,10 @@ local dolphin = {
     xp_min = 1,
     xp_max = 3,
     armor = 100,
-		walk_chance = 100,
-		breath_max = 120,
+	walk_chance = 100,
+	breath_max = 120,
+	rotate = 270,
+    tilt_swim = true,
     collisionbox = {-0.3, 0.0, -0.3, 0.3, 0.79, 0.3},
     visual = "mesh",
     mesh = "extra_mobs_dolphin.b3d",
@@ -65,8 +67,7 @@ local dolphin = {
 		},
     visual_size = {x=3, y=3},
     makes_footstep_sound = false,
-    fly = true,
-    fly_in = { mobs_mc.items.water_source, mobs_mc.items.river_water_source },
+    swim = true,
     breathes_in_water = true,
     jump = false,
     view_range = 16,