add missing param

Author: big-nacho

vectorizing/geometry/segment_list.py

@@ -17,7 +17,7 @@ def flattened(self, _):
     def to_list(self):
         return list(self.points)
 
-    def bounds(self):
+    def bounds(self, _):
         t = self.points.T
         x = t[0]
         y = t[1]