From 9c899813732d3c763729ea15fbe33be09b868fda Mon Sep 17 00:00:00 2001
From: Yorik van Havre <yorik@uncreated.net>
Date: Sat, 28 May 2016 22:35:14 -0300
Subject: [PATCH] Draft: solved bug in snapper - fixes #2563

---
 src/Mod/Draft/DraftSnap.py | 5 ++++-
 1 file changed, 4 insertions(+), 1 deletion(-)

diff --git a/src/Mod/Draft/DraftSnap.py b/src/Mod/Draft/DraftSnap.py
index 8046a8dc8..d549f0096 100644
--- a/src/Mod/Draft/DraftSnap.py
+++ b/src/Mod/Draft/DraftSnap.py
@@ -1061,7 +1061,10 @@ class Snapper:
             FreeCADGui.Snapper.off()
             self.ui.offUi()
             if callback:
-                callback(None)
+                if len(inspect.getargspec(callback).args) > 1:
+                    callback(None,None)
+                else:
+                    callback(None)
             
         # adding callback functions
         self.ui.pointUi(cancel=cancel,getcoords=getcoords,extra=extradlg,rel=bool(last))