[orca/orca-xdesktop] Fix for bug #664466 - Orca's flat review cannot access the top line of gnome-terminal console

[Joanmarie Diggs <joanied src gnome org>]

commit 75d059f4ac32c8b55b2c2250bb1c4be0af2f0fc9
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Wed Nov 23 11:39:53 2011 +0100

    Fix for bug #664466 - Orca's flat review cannot access the top line of gnome-terminal console

 src/orca/flat_review.py |   10 ++++++----
 1 files changed, 6 insertions(+), 4 deletions(-)
---
diff --git a/src/orca/flat_review.py b/src/orca/flat_review.py
index 360b481..0486db4 100644
--- a/src/orca/flat_review.py
+++ b/src/orca/flat_review.py
@@ -429,10 +429,12 @@ class ValueZone(Zone):
                     orientation = _("vertical")
                         
             value = self.accessible.queryValue()
-            percentValue = int((value.currentValue
-                                / (value.maximumValue
-                                   - value.minimumValue))
-                               * 100.0)
+            try:
+                percentValue = int((value.currentValue /
+                                    (value.maximumValue - value.minimumValue))
+                                   * 100.0)
+            except ZeroDivisionError:
+                percentValue = 0
 
             if orientation:
                 speechValue = orientation + " " + \