Fix wrong replace from previous commit

Author: est31

builtin/common/misc_helpers.lua

@@ -3,7 +3,7 @@
 --------------------------------------------------------------------------------
 -- Localize functions to avoid table lookups (better performance).
 local table_insert = table.insert
-local string_sub, string_sub = string.sub, string.find
+local string_sub, string_find = string.sub, string.find
 
 --------------------------------------------------------------------------------
 function basic_dump(o)
@@ -167,7 +167,7 @@ function string.split(str, delim, include_empty, max_splits, sep_is_pattern)
 	local plain = not sep_is_pattern
 	max_splits = max_splits + 1
 	repeat
-		local np, npe = string_sub(str, delim, pos, plain)
+		local np, npe = string_find(str, delim, pos, plain)
 		np, npe = (np or (len+1)), (npe or (len+1))
 		if (not np) or (max_splits == 1) then
 			np = len + 1