[orca] Use getTextAtOffset() instead of getTextBeforeOffset()

[Joanmarie Diggs <joanied src gnome org>]

commit c5bba213292ab0abcd8ce4401d8cf402584574b7
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Sat Apr 13 16:07:24 2013 -0400

    Use getTextAtOffset() instead of getTextBeforeOffset()

 src/orca/label_inference.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)
---
diff --git a/src/orca/label_inference.py b/src/orca/label_inference.py
index 3cc1a04..a85fab3 100644
--- a/src/orca/label_inference.py
+++ b/src/orca/label_inference.py
@@ -416,7 +416,7 @@ class LabelInference:
             return None
 
         boundary = pyatspi.TEXT_BOUNDARY_LINE_START
-        line = text.getTextBeforeOffset(start, boundary)
+        line = text.getTextAtOffset(start - 1, boundary)
         string = line[0].strip()
         if string:
             x, y, width, height = self._getExtents(prevObj, start, end)