doc fixes

doc/extending/graphstructures.txt

@@ -417,7 +417,7 @@ such that: ``var.clients[*][0].inputs[index]`` or
     client = var.clients[0]
     client
     # (Sum(Elemwise{add,no_inplace}.0), 0)
-    type(clients[0][0])
+    type(client[0])
     # <class 'theano.gof.graph.Apply'>
     assert client[0].inputs[client[1]] is var
 

doc/library/compile/debugmode.txt

@@ -27,7 +27,7 @@ DebugMode can be used as follows:
 
 .. code-block:: python
 
-    x = tensor.dvector('x')
+    x = tensor.dscalar('x')
 
     f = theano.function([x], 10*x, mode='DebugMode')