[hamster-applet] don't die if there is nothing to highlight

[Toms Baugis <tbaugis src gnome org>]

commit 83709ba09c723b1e79f5ae8a241eec34af72442a
Author: Toms Bauģis <toms baugis gmail com>
Date:   Sat Jan 16 17:24:00 2010 +0000

    don't die if there is nothing to highlight

 hamster/widgets/dayline.py |    6 ++++--
 1 files changed, 4 insertions(+), 2 deletions(-)
---
diff --git a/hamster/widgets/dayline.py b/hamster/widgets/dayline.py
index 03acf4c..05525d1 100644
--- a/hamster/widgets/dayline.py
+++ b/hamster/widgets/dayline.py
@@ -126,8 +126,10 @@ class DayLine(graphics.Area):
 
         mouse_down = state & gtk.gdk.BUTTON1_MASK
 
-        highlight_start = self.highlight_start + self.graph_x
-        highlight_end = self.highlight_end + self.graph_x
+        highlight_start, highlight_end = None, None
+        if self.highlight_start:
+            highlight_start = self.highlight_start + self.graph_x
+            highlight_end = self.highlight_end + self.graph_x
 
         if highlight_start != None:
             start_drag = 10 > (highlight_start - x) > -1