fix bug reported by Ilya of scan adding extra inputs when it needs not to.

theano/scan_module/scan.py

@@ -773,13 +773,16 @@ def scan( fn
 
     # extract still missing inputs (there still might be so) and add them
     # as non sequences at the end of our args
-
+    fake_nonseqs = [x.type() for x in non_seqs]
+    fake_outputs = scan_utils.clone(outputs,
+                                    replace=dict(zip(non_seqs,
+                                                     fake_nonseqs)))
     all_inputs = itertools.ifilter(
         lambda x: ( isinstance(x, gof.Variable) and
                    not isinstance(x, SharedVariable) and
                    not isinstance(x, gof.Constant) ),
-        gof.graph.inputs( outputs) )
-    extra_inputs     = filter( lambda x: x not in args,
+        gof.graph.inputs( fake_outputs) )
+    extra_inputs     = filter( lambda x: x not in args + fake_nonseqs,
                                     all_inputs)
     non_seqs += extra_inputs
     ## Note we do not use all_inputs directly since the order of variables