Allow mods to override animation globalstep

mods/player_api/api.lua

@@ -178,8 +178,8 @@ function minetest.calculate_knockback(player, ...)
 end
 
 -- Check each player and apply animations
-minetest.register_globalstep(function()
-	for _, player in pairs(minetest.get_connected_players()) do
+function player_api.globalstep()
+	for _, player in ipairs(minetest.get_connected_players()) do
 		local name = player:get_player_name()
 		local player_data = players[name]
 		local model = player_data and models[player_data.model]
@@ -208,6 +208,11 @@ minetest.register_globalstep(function()
 			end
 		end
 	end
+end
+
+-- Mods can modify the globalstep by overriding player_api.globalstep
+minetest.register_globalstep(function(...)
+	player_api.globalstep(players, ...)
 end)
 
 for _, api_function in pairs({"get_animation", "set_animation", "set_model", "set_textures"}) do