From 391fb28b9b6d01679c10c8f978baf560003b8014 Mon Sep 17 00:00:00 2001
From: Walter Bender <walter@sugarlabs.org>
Date: Tue, 02 Mar 2010 01:37:33 +0000
Subject: corner case: empty SVG

---
diff --git a/tacanvas.py b/tacanvas.py
index f317996..77e42ad 100644
--- a/tacanvas.py
+++ b/tacanvas.py
@@ -375,6 +375,8 @@ class TurtleGraphics:
         self.pendown = self.tw.active_turtle.get_pen_state()
 
     def svg_close(self):
+        if self.tw.svg_string == '':
+            return
         self.svg.calc_w_h(False)
         self.tw.svg_string = "%s%s%s%s" % (self.svg.header(True),
                                          self.svg.background(self.bgcolor),
diff --git a/tawindow.py b/tawindow.py
index eb42aad..b249f18 100644
--- a/tawindow.py
+++ b/tawindow.py
@@ -2621,6 +2621,8 @@ class TurtleArtWindow():
             datapath = os.getcwd()
         file_path = os.path.join(datapath, filename)
         if svg:
+            if self.svg_string == '':
+                return
             save_svg(self.svg_string, file_path)
             self.svg_string = ''
         else:
--
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