[pygobject] The tags can be Empty not None.

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 771ef76574690eb98926249f38661d741d1ebbb0
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Tue Jan 18 12:02:01 2011 +0100

    The tags can be Empty not None.

 gi/overrides/Gtk.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/gi/overrides/Gtk.py b/gi/overrides/Gtk.py
index 2730dbf..8f1befa 100644
--- a/gi/overrides/Gtk.py
+++ b/gi/overrides/Gtk.py
@@ -574,7 +574,7 @@ class TextBuffer(Gtk.TextBuffer):
         start_offset = iter.get_offset()
         self.insert(iter, text)
 
-        if tags is None:
+        if not tags:
             return
 
         start = self.get_iter_at_offset(start_offset)