Fix bugs in scan helper functions

theano/scan_module/scan_op.py

@@ -1512,8 +1512,9 @@ class Scan(PureOp):
 
         # Process shared inputs/outputs
         input_offset += self.n_nit_sot
+        output_offset += self.n_nit_sot
         for i in range(self.n_shared_outs):
-            result[output_offset + i] = input_offset
+            result[output_offset] = input_offset
             input_offset += 1
             output_offset += 1