Fix warnings in new luacheck

.luacheckrc

@@ -9,6 +9,7 @@ exclude_files = {
 	"mods/treasurer",
 }
 
+ignore = {"631"}
 
 globals = {
 	"crafting", "vector", "table", "minetest",

mods/ctf_alloc/init.lua

@@ -29,7 +29,7 @@ end, {
 	}
 })
 
-function table.map_inplace(t, f)
+function table.map_inplace(t, f) -- luacheck: ignore
 	for key, value in pairs(t) do
 		t[key] = f(value)
 	end

mods/random_messages/init.lua

@@ -11,13 +11,13 @@ math.randomseed(os.time())
 random_messages = {}
 random_messages.messages = {} --This table contains all messages.
 
-function table.count( t )
+function table.count( t ) -- luacheck: ignore
 	local i = 0
 	for k in pairs( t ) do i = i + 1 end
 	return i
 end
 
-function table.random( t )
+function table.random( t ) -- luacheck: ignore
 	local rk = math.random( 1, table.count( t ) )
 	local i = 1
 	for k, v in pairs( t ) do