[orca] Another brlmon-related sanity check

[Joanmarie Diggs <joanied src gnome org>]

commit 1ef3eebfbc94c7efafd36222f3d867fa39d13332
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Apr 3 16:58:13 2012 -0400

    Another brlmon-related sanity check

 src/orca/braille.py |   11 ++++++++---
 1 files changed, 8 insertions(+), 3 deletions(-)
---
diff --git a/src/orca/braille.py b/src/orca/braille.py
index bf34e36..75e63ac 100644
--- a/src/orca/braille.py
+++ b/src/orca/braille.py
@@ -1447,13 +1447,18 @@ def refresh(panToCursor=True,
 
     if settings.enableBrailleMonitor:
         if not _monitor:
-            _monitor = brlmon.BrlMon(_displaySize[0])
-            _monitor.show_all()
+            try:
+                _monitor = brlmon.BrlMon(_displaySize[0])
+                _monitor.show_all()
+            except:
+                debug.println(debug.LEVEL_WARNING, "brlmon failed")
+                _monitor = None
         if attributeMask:
             subMask = attributeMask[startPos:endPos]
         else:
             subMask = None
-        _monitor.writeText(cursorCell, substring, subMask)
+        if _monitor:
+            _monitor.writeText(cursorCell, substring, subMask)
     elif _monitor:
         _monitor.destroy()
         _monitor = None