Use updated interface for multiplication

Author: andykee

lentil/plane.py

@@ -826,7 +826,7 @@ def __init__(self, amplitude=1, opd=0, mask=None, pixelscale=None,
                          **kwargs)
 
     def __mul__(self, wavefront):
-        wavefront = super().multiply(wavefront)
+        wavefront = super().__mul__(wavefront)
         wavefront.ptype = lentil.image
         return wavefront