Fixed silly error

theano/gpuarray/opt.py

@@ -238,7 +238,7 @@ class GraphToGPU(Optimizer):
         # Iterating through output of all the nodes
         for n in fgraph.toposort():
             for o in n.outputs:
-                if isinstance(i.type, tensor.TensorType):
+                if isinstance(o.type, tensor.TensorType):
                     mapping[o] = GpuFromHost(None)(o)
                 else:
                     mapping[o] = o
@@ -280,10 +280,7 @@ class GraphToGPU(Optimizer):
                     mapping[o] = o
 
         for o in fgraph.outputs:
-                try:
             new_o = mapping[o]
-                except KeyError as k:
-                    pass
             if new_o.type != o.type:
                 assert isinstance(o.type, tensor.TensorType)
                 assert isinstance(new_o.type, GpuArrayType)