Fixes #1420

Cleans up vararg handling, previously done really badly by AI...

web/space_lua/language_core_test.lua

@@ -559,4 +559,16 @@ local b, c = select(-2, 1, 2, 3)
 assertEqual(b, 2)
 assertEqual(c, 3)
 -- Special "#" case
-assertEqual(select("#", 1, 2, 3), 3)
+assertEqual(select("#", 1, 2, 3), 3)
+
+
+-- Some more vararg verification
+function varArgTest(a0, ...)
+    -- ... gets the multi arg treatment
+    local a1, a2 = ...
+    assertEqual(a0, 1)
+    assertEqual(a1, 2)
+    assertEqual(a2, 3)
+end
+
+varArgTest(1, 2, 3, 4)