dont relly on the legacy layer of default mod, detect if player api is present

* this mod was using the legacy.lua extension of default mod,
  with this patch we can avout the player_api or use it if present

api.lua

@@ -23,7 +23,7 @@
 
 --from lib_mount (required by new functions)
 
-
+local p_api = minetest.get_modpath("player_api")
 local mobs_redo = false
 if mobs.mod and mobs.mod == "redo" then
 	mobs_redo = true
@@ -43,7 +43,8 @@ local function force_detach(player)
 		end
 		player:set_detach()
 	end
-	default.player_attached[player:get_player_name()] = false
+	if p_api then player_api.player_attached[player:get_player_name()] = false
+	else default.player_attached[player:get_player_name()] = false end
 	player:set_eye_offset({x=0, y=0, z=0}, {x=0, y=0, z=0})
 end
 
@@ -56,9 +57,12 @@ function mobs_doomed.object_attach(entity, player, attach_at, eye_offset)
 	player:set_properties({visual_size = {x=1, y=1}})
 	
 	player:set_eye_offset(eye_offset, {x=0, y=0, z=0})
-	default.player_attached[player:get_player_name()] = true
+	if p_api then player_api.player_attached[player:get_player_name()] = true
+	else default.player_attached[player:get_player_name()] = true end
+
 	minetest.after(0.2, function()
-		default.player_set_animation(player, "sit" , 30)
+		if p_api then player_api.set_animation(player, "sit" , 30)
+		else default.player_set_animation(player, "sit" , 30) end
 	end)
 	--entity.object:set_yaw(player:get_look_yaw() - math.pi / 2)
 	entity.object:set_yaw(player:get_look_horizontal() - (math.pi/2))
@@ -67,8 +71,13 @@ end
 function mobs_doomed.object_detach(entity, player, offset)
 	entity.driver = nil
 	player:set_detach()
-	default.player_attached[player:get_player_name()] = false
-	default.player_set_animation(player, "stand" , 30)
+	if p_api then
+		player_api.player_attached[player:get_player_name()] = false
+		player_api.set_animation(player, "stand" , 30)
+	else
+		default.player_attached[player:get_player_name()] = false
+		default.player_set_animation(player, "stand" , 30)
+	end
 	player:set_eye_offset({x=0, y=0, z=0}, {x=0, y=0, z=0})
 	local pos = player:get_pos()
 	pos = {x = pos.x + offset.x, y = pos.y + 0.2 + offset.y, z = pos.z + offset.z}

depends.txt

@@ -6,3 +6,4 @@ bones?
 ethereal?
 caverealms?
 mobs_animal?
+player_api?

mod.conf

@@ -1,4 +1,4 @@
 name = mobs_doomed
 depends = default, mobs, wool, farming
-optional_depends = bones, ethereal, caverealms, mobs_animal
+optional_depends = bones, ethereal, caverealms, mobs_animal, player_api
 description = MOBS for more monsters like dragons, orcs, ogres, elephans, etc