typo

src/roster_window.py

@@ -711,7 +711,7 @@ class Roster_window:
 			if event.button == 1: # Left click
 				try:
 					path, column, x, y = self.tree.get_path_at_pos(int(event.x), 
-						nt(event.y))
+						int(event.y))
 				except TypeError:
 					self.tree.get_selection().unselect_all()
 					return False