From 1d7fc5fcdaa0e16ac6583709248ba4635129807b Mon Sep 17 00:00:00 2001
From: Oleh Prypin <blaxpirit@gmail.com>
Date: Thu, 9 Apr 2015 03:36:53 +0300
Subject: [PATCH] Don't add a comma too soon

Fixes #2495
---
 compiler/jsgen.nim | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/compiler/jsgen.nim b/compiler/jsgen.nim
index 382fe49df3..6c667a3a71 100644
--- a/compiler/jsgen.nim
+++ b/compiler/jsgen.nim
@@ -791,10 +791,10 @@ proc genIf(p: PProc, n: PNode, r: var TCompRes) =
 proc generateHeader(p: PProc, typ: PType): Rope =
   result = nil
   for i in countup(1, sonsLen(typ.n) - 1):
-    if result != nil: add(result, ", ")
     assert(typ.n.sons[i].kind == nkSym)
     var param = typ.n.sons[i].sym
     if isCompileTimeOnly(param.typ): continue
+    if result != nil: add(result, ", ")
     var name = mangleName(param)
     add(result, name)
     if mapType(param.typ) == etyBaseIndex: