Allow foreach on 0-indexed arrays

lua/entities/gmod_wire_expression2/core/array.lua

@@ -65,7 +65,7 @@
 -- Looped functions and operators
 --------------------------------------------------------------------------------
 registerCallback( "postinit", function()
 	local getf, setf
 	for k,v in pairs( wire_expression_types ) do
 		local name = k:lower()
 		if (name == "normal") then name = "number" end
@@ -231,14 +231,20 @@
 
 			local function iter(tbl, i)
 				local v = tbl[i + 1]
 				if not typecheck(v) then
 					return i + 1, v
 				end
 			end
 
 			registerOperator("iter", "n" .. id .. "=r", "", function(state, array)
-				return function()
-					return iter, array, 0
+				if array[0] then
+					return function()
+						return iter, array, -1
+					end
+				else
+					return function()
+						return iter, array, 0
+					end
 				end
 			end)