corrected Flatten view_map and perform

theano/tensor/basic.py

@@ -1942,8 +1942,7 @@ class Flatten(Op):
     """Flattens a tensor to `outdim` dimensions by preserving the leading outdim-1 shape
     components.
     """
-    #Could be done as a reshape, but this is more direct.
-    #TODO: optimize reshape(x, prod(shape(x))) -> flatten(x)
+    view_map = {0:[0]}
     def __init__(self, outdim=1):
         self.outdim = int(outdim)
     def __eq__(self, other):
@@ -1958,9 +1957,9 @@ class Flatten(Op):
     def perform(self, node, (x,), (out,)):
         outdim = self.outdim
         if outdim == 1:
-            out[0] = x.flatten()
+            out[0] = x.reshape(x.size)
         elif outdim == len(x.shape):
-            out[0] = x.copy()
+            out[0] = x
         else:
             newshape = x.shape[:outdim-1] + (numpy.prod(x.shape[outdim-1:]),)
             #print 'newshape', newshape, x.shape, x.shape