Fix deprication warnings (#24)

* fix deprication warning 'initial_properties'

WARNING[Server]: Reading initial object properties directly from an
entity definition is deprecated, move it to the 'initial_properties'
table instead. (Property 'static_save' in entity
'spacecannon:energycube_<colour>')

* fix deprication warning getpos -> get_pos

WARNING[Server]: Call to deprecated function 'getpos', use 'get_pos'
instead.

* Fix deprication warning set_velocity

Call to deprecated function 'setvelocity', use 'set_velocity' instead

Author: SwissalpS

cannon.lua

@@ -35,11 +35,11 @@ local register_spacecannon = function(def)
 				entity_texture
 			},
 			collisionbox = {-0.25,-0.25,-0.25, 0.25,0.25,0.25},
-			physical = false
+			physical = false,
+			static_save = false,
 		},
 		timer = 0,
 		lifetime = 0,
-		static_save = false,
 		penetrated = 0,
 
 		on_step = function(self, dtime)
@@ -51,7 +51,7 @@ local register_spacecannon = function(def)
 				return
 			end
 
-			local pos = self.object:getpos()
+			local pos = self.object:get_pos()
 
 			if self.timer > 0.5 then
 				-- add sparks along the way

util.lua

@@ -117,7 +117,7 @@ spacecannon.fire = function(pos, playername, color, speed, is_th, storage_requir
 	local node = minetest.get_node(pos)
 	local dir = spacecannon.facedir_to_down_dir(node.param2)
 	local obj = minetest.add_entity({x=pos.x+dir.x, y=pos.y+dir.y, z=pos.z+dir.z}, "spacecannon:energycube_" .. color)
-	obj:setvelocity({x=dir.x*speed, y=dir.y*speed, z=dir.z*speed})
+	obj:set_velocity({ x = dir.x * speed, y = dir.y * speed, z = dir.z * speed })
 end
 
 -- destroy stuff in range