Fix several "undeclared global" errors

mods/ENTITIES/mcl_mobs/api.txt

@@ -395,7 +395,7 @@ This function registers a arrow for mobs with the attack type shoot.
                       (self, player)
        'hit_mob'      a function that is called when the arrow hits a mob;
                       this function should hurt the mob, the parameters are
-                      (self, player)
+                      (self, mob)
        'hit_node'     a function that is called when the arrow hits a node, the
                       parameters are (self, pos, node)
        'tail'         when set to 1 adds a trail or tail to mob arrows

mods/ENTITIES/mobs_mc/wither.lua

@@ -132,7 +132,7 @@ mobs:register_arrow(":mobs_mc:fireball", {
 
 	-- direct hit, no fire... just plenty of pain
 	hit_player = function(self, player)
-	minetest.sound_play("tnt_explode", {pos = pos, gain = 1.5, max_hear_distance = 16})
+		minetest.sound_play("tnt_explode", {pos = player:get_pos(), gain = 1.5, max_hear_distance = 16})
 		player:punch(self.object, 1.0, {
 			full_punch_interval = 0.5,
 			damage_groups = {fleshy = 8},
@@ -140,8 +140,8 @@ mobs:register_arrow(":mobs_mc:fireball", {
 
 	end,
 
-	hit_mob = function(self, player)
-	minetest.sound_play("tnt_explode", {pos = pos, gain = 1.5,max_hear_distance = 16})
+	hit_mob = function(self, mob)
+		minetest.sound_play("tnt_explode", {pos = mob:get_pos(), gain = 1.5,max_hear_distance = 16})
 		player:punch(self.object, 1.0, {
 			full_punch_interval = 0.5,
 			damage_groups = {fleshy = 8},

mods/ITEMS/mcl_flowers/init.lua

@@ -398,14 +398,13 @@ minetest.register_node("mcl_flowers:waterlily", {
 					local idef = itemstack:get_definition()
 
 					if idef.sounds and idef.sounds.place then
-						minetest.sound_play(idef.sounds.place, {pos=above, gain=1})
+						minetest.sound_play(idef.sounds.place, {pos=pointed_thing.above, gain=1})
 					end
 
 					if not minetest.settings:get_bool("creative_mode") then
 						itemstack:take_item()
 					end
 				else
-					minetest.chat_send_player(player_name, "Node is protected")
 					minetest.record_protection_violation(pos, player_name)
 				end
 			end

mods/PLAYER/mcl_spawn/init.lua

@@ -1,5 +1,7 @@
 mcl_spawn = {}
 
+local mg_name = minetest.get_mapgen_setting("mg_name")
+
 -- Returns current spawn position of player.
 -- If player is nil or not a player, the default spawn point is returned.
 -- The second return value is true if spawn point is player-chosen,