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
@@ -279,16 +279,13 @@ class GraphToGPU(Optimizer):
                 for o in node.outputs:
                     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)
-                    new_o = host_from_gpu(new_o)
-                fgraph.replace_validate(o, new_o)
+        for o in fgraph.outputs:
+            new_o = mapping[o]
+            if new_o.type != o.type:
+                assert isinstance(o.type, tensor.TensorType)
+                assert isinstance(new_o.type, GpuArrayType)
+                new_o = host_from_gpu(new_o)
+            fgraph.replace_validate(o, new_o)
 
 
 gpu_seqopt.register('GraphToGPU', GraphToGPU(),