1 files changed, 7 insertions, 1 deletions
diff --git a/awall/util.lua b/awall/util.lua
index 19a003d..f5afb37 100644
--- a/awall/util.lua
+++ b/awall/util.lua
@@ -9,7 +9,9 @@ module(..., package.seeall)
 
 local function list(var)
    if not var then return {} end
-   return type(var) == 'table' and var[1] and var or {var}
+   if type(var) ~= 'table' then return {var} end
+   if not next(var) then return {} end
+   return var[1] and var or {var}
 end
 
 function listpairs(var)
@@ -31,3 +33,7 @@ function contains(tbl, value)
    for k, v in pairs(tbl) do if v == value then return true end end
    return false
 end
+
+function extend(tbl1, tbl2)
+   for i, var in listpairs(tbl2) do table.insert(tbl1, var) end
+end