[gedit/gnome-3-14] snippets: fix overriding of get_start_iter()

[Sébastien Wilmet <swilmet src gnome org>]

commit 215f389b733768527022108d49f5641af4674a2d
Author: Sébastien Wilmet <swilmet gnome org>
Date:   Sun Jan 4 12:50:51 2015 +0100

    snippets: fix overriding of get_start_iter()
    
    @iter is an (out) parameter.
    
    https://bugzilla.gnome.org/show_bug.cgi?id=742015

 plugins/snippets/snippets/completion.py |    8 +++-----
 1 files changed, 3 insertions(+), 5 deletions(-)
---
diff --git a/plugins/snippets/snippets/completion.py b/plugins/snippets/snippets/completion.py
index 4427f21..83385a6 100644
--- a/plugins/snippets/snippets/completion.py
+++ b/plugins/snippets/snippets/completion.py
@@ -87,13 +87,11 @@ class Provider(GObject.Object, GtkSource.CompletionProvider):
         else:
             return None
 
-    def do_get_start_iter(self, context, proposal, iter):
+    def do_get_start_iter(self, context, proposal):
         if not self.mark or self.mark.get_deleted():
-            return False
+            return (False, None)
 
-        iter.assign(self.mark.get_buffer().get_iter_at_mark(self.mark))
-
-        return True
+        return (True, self.mark.get_buffer().get_iter_at_mark(self.mark))
 
     def do_match(self, context):
         return True