Fix condition in equal_computations

theano/scan_module/scan_utils.py

@@ -490,8 +490,8 @@ def equal_computations(xs, ys, in_xs=None, in_ys=None):
 
     # Validate that each xs[i], ys[i] pair represents the same computation
     for i in range(len(xs)):
-        if xs[0].owner:
-            # The case where xs and ys don't both have an owner
+        if xs[i].owner:
+            # The case where pairs of x[i]s and y[i]s don't both have an owner
             # have already been adressed.
             is_equal = compare_nodes(xs[i].owner, ys[i].owner)
             if not is_equal: