Add table.count function to mcl_util

.luacheckrc

@@ -216,6 +216,7 @@ read_globals = {
 			"key_value_swap",
 			"shuffle",
 			reverse = { read_only = false },
+			count = { read_only = false },
 		}
 	},
 

mods/CORE/mcl_util/init.lua

@@ -36,6 +36,16 @@ function table.reverse(t)
 	end
 end
 
+function table.count(t, does_it_count)
+	local r = 0
+	for k, v in pairs(t) do
+		if does_it_count == nil or ( type(does_it_count) == "function" and does_it_count(k, v) ) then
+			r = r + 1
+		end
+	end
+	return r
+end
+
 local LOGGING_ON = minetest.settings:get_bool("mcl_logging_default", false)
 local LOG_MODULE = "[MCL2]"
 function mcl_util.mcl_log(message, module, bypass_default_logger)