GTK3: pixbuf.save is not available via gi, use savev. Like this scaling works again

svn: r20069

src/gui/thumbnails.py

@@ -211,7 +211,7 @@ def __create_thumbnail_image(src_file, mtype=None, rectangle=None,
             
             pixbuf = pixbuf.scale_simple(scaled_width, scaled_height, 
                                          GdkPixbuf.InterpType.BILINEAR)
-            pixbuf.save(filename, "png")
+            pixbuf.savev(filename, "png", "", "")
             return True
         except Exception, err:
             LOG.warn("Error scaling image down: %s", str(err))

src/gui/widgets/photo.py

@@ -25,6 +25,7 @@
 #
 #-------------------------------------------------------------------------
 from gi.repository import GObject
+from gi.repository import Gdk
 from gi.repository import Gtk
 
 #-------------------------------------------------------------------------