[gedit-plugins] Copy pango description as we are editing it.

[Ignacio Casal Quinteiro <icq src gnome org>]

commit 8b665351b6943b3dcad12a20fda08d07875bb8e5
Author: Ignacio Casal Quinteiro <icq gnome org>
Date:   Wed Mar 9 22:53:18 2011 +0100

    Copy pango description as we are editing it.

 plugins/textsize/textsize/documenthelper.py |    2 +-
 1 files changed, 1 insertions(+), 1 deletions(-)
---
diff --git a/plugins/textsize/textsize/documenthelper.py b/plugins/textsize/textsize/documenthelper.py
index 10fdba2..7adc9d9 100644
--- a/plugins/textsize/textsize/documenthelper.py
+++ b/plugins/textsize/textsize/documenthelper.py
@@ -94,7 +94,7 @@ class DocumentHelper(Signals):
             description.set_size(max(1, (size + amount)) * Pango.SCALE)
 
             self._view.override_font(description)
-            self._last_font = description
+            self._last_font = description.copy()
         else:
             start = bounds[0]
             end = bounds[1]