[gnome-builder] python: fix warnings from gi

[Christian Hergert <chergert src gnome org>]

commit 5dd1661172235fdf30dad4a88ce4b5f0dff5e77b
Author: Christian Hergert <christian hergert me>
Date:   Fri Sep 4 13:14:14 2015 -0700

    python: fix warnings from gi
    
    Just some annoying runtime warnings.

 .../python_gi_imports_completion.py                |   10 ++++++++--
 1 files changed, 8 insertions(+), 2 deletions(-)
---
diff --git a/plugins/python-gi-imports-completion/python_gi_imports_completion.py 
b/plugins/python-gi-imports-completion/python_gi_imports_completion.py
index 3790796..03e916a 100644
--- a/plugins/python-gi-imports-completion/python_gi_imports_completion.py
+++ b/plugins/python-gi-imports-completion/python_gi_imports_completion.py
@@ -20,6 +20,14 @@
 # along with this program.  If not, see <http://www.gnu.org/licenses/>.
 #
 
+import gi
+import os
+
+gi.require_version('Gtk', '3.0')
+gi.require_version('GtkSource', '3.0')
+gi.require_version('GIRepository', '2.0')
+gi.require_version('Ide', '1.0')
+
 from gi.repository import GIRepository
 from gi.repository import GLib
 from gi.repository import GObject
@@ -27,8 +35,6 @@ from gi.repository import Gtk
 from gi.repository import GtkSource
 from gi.repository import Ide
 
-import os
-
 # 2 minutes
 CACHE_EXPIRE_USEC = 2 * 60 * 1000 * 1000