Fix old problems in Theano that we now trigger

theano/scalar/basic.py

@@ -3064,7 +3064,7 @@ arctan = ArcTan(upgrade_to_float, name='arctan')
 
 
 class ArcTan2(BinaryScalarOp):
-    nfunc_spec = ('arctan2', 1, 1)
+    nfunc_spec = ('arctan2', 2, 1)
 
     def impl(self, y, x):
         # If x and y are int8 or uint8, numpy.arctan2 will compute the result

theano/sparse/basic.py

@@ -1015,7 +1015,7 @@ class GetItemList(gof.op.Op):
     def grad(self, inputs, g_outputs):
         x, indices = inputs
         gout, = g_outputs
-        return [GetItemListGrad(self)(x, indices, gout),
+        return [GetItemListGrad()(x, indices, gout),
                 grad_undefined(self, 1, indices, "No gradient for this input")]
 
 get_item_list = GetItemList()