Make pygtk 2.14 failures more graceful

terminatorlib/terminatorterm.py

@@ -1661,6 +1661,7 @@ text/plain
     # Center it over the current terminal (not perfect?!?)
     # This could be replaced by a less bothersome dialog, but then that would
     # center over the window, not the terminal
+    try:
       screen_w = gtk.gdk.screen_width()
       screen_h = gtk.gdk.screen_height()
       local_x, local_y = self.allocation.x, self.allocation.y
@@ -1672,6 +1673,9 @@ text/plain
       new_x = min(max(0, x+(local_w/2)-(win.allocation.width/2)), screen_w-win.allocation.width)
       new_y = min(max(0, y+(local_h/2)-(win.allocation.height/2)), screen_h-win.allocation.height)
       win.move(new_x, new_y)
+    except AttributeError:
+      # Old pygtk has no gtk.Widget.get_window()
+      pass
     
     win.show_all ()