wea.table_filter: also pass i as the 2nd argument

worldeditadditions/utils/tables.lua

@@ -83,13 +83,16 @@ end
 --- Filters the items in the given table using the given function.
 -- The function is executed for each item in the list. If it returns true, the
 -- item is kept. If it returns false, the item is discarded.
+-- Arguments passed to the function: item, i
+-- ...where item is the item to filter, and i is the index in the table the item
+-- is located at.
 -- @param	tbl		table		The table of values to filter.
--- @param	func	function<any>:bool	The filter function to execute - should return a boolean value indicating whether the item provided as the first argument should be kept
+-- @param	func	function<any, number>:bool	The filter function to execute - should return a boolean value indicating whether the item provided as the first argument should be kept
 -- @returns	table	A new table containing the values that the given function returned true for.
 function worldeditadditions.table_filter(tbl, func)
 	local result = {}
 	for i,value in ipairs(tbl) do
-		if func(value) then
+		if func(value, i) then
 			table.insert(result, value)
 		end
 	end