Merge pull request 'Instadig and -kill mobs in (gamemode-)creative mode' (#2646) from creative_digging into master

Reviewed-on: MineClone2/MineClone2#2646
Reviewed-by: PrairieWind <prairie.astronomer1@gmail.com>

mods/ENTITIES/mcl_mobs/api.lua

@@ -3148,6 +3148,10 @@ local mob_punch = function(self, hitter, tflp, tool_capabilities, dir)
 			return
 		end
 
+		if minetest.is_creative_enabled(hitter:get_player_name()) then
+			self.health = 0
+		end
+
 		-- set/update 'drop xp' timestamp if hitted by player
 		self.xp_timestamp = minetest.get_us_time()
 	end

mods/HUD/mcl_inventory/init.lua

@@ -196,6 +196,7 @@ local mt_is_creative_enabled = minetest.is_creative_enabled
 
 function minetest.is_creative_enabled(name)
 	if mt_is_creative_enabled(name) then return true end
+	if not name then return false end
 	local p = minetest.get_player_by_name(name)
 	if p then
 		return p:get_meta():get_string("gamemode") == "creative"
@@ -203,6 +204,20 @@ function minetest.is_creative_enabled(name)
 	return false
 end
 
+--Insta "digging" nodes in gamemode-creative
+minetest.register_on_punchnode(function(pos, node, puncher, pointed_thing)
+	if minetest.is_creative_enabled() then return end
+	local name = puncher:get_player_name()
+	if not minetest.is_creative_enabled(name) then return end
+	if pointed_thing.type ~= "node" then return end
+	local def = minetest.registered_nodes[node.name]
+	if def then
+		if def.on_destruct then def.on_destruct(pos) end
+		minetest.remove_node(pos)
+		return true
+	end
+end)
+
 local function in_table(n,h)
 	for k,v in pairs(h) do
 		if v == n then return true end