[orca] Adjust the item count for Gedit's Suggestions list to not include header

[Joanmarie Diggs <joanied src gnome org>]

commit 2db243de21a275fa1634b8deb9621c95f7970959
Author: Joanmarie Diggs <jdiggs igalia com>
Date:   Tue Aug 18 20:22:51 2015 -0400

    Adjust the item count for Gedit's Suggestions list to not include header

 src/orca/scripts/apps/gedit/spellcheck.py |    4 +++-
 1 files changed, 3 insertions(+), 1 deletions(-)
---
diff --git a/src/orca/scripts/apps/gedit/spellcheck.py b/src/orca/scripts/apps/gedit/spellcheck.py
index b8fd8dc..15d1f31 100644
--- a/src/orca/scripts/apps/gedit/spellcheck.py
+++ b/src/orca/scripts/apps/gedit/spellcheck.py
@@ -66,4 +66,6 @@ class SpellCheck(spellcheck.SpellCheck):
         return pyatspi.findDescendant(root, isTable)
 
     def _getSuggestionIndexAndPosition(self, suggestion):
-        return self._script.utilities.getPositionAndSetSize(suggestion)
+        index, total = self._script.utilities.getPositionAndSetSize(suggestion)
+        total -= 1
+        return index, total