Fix and add an assert

theano/tensor/opt.py

@@ -379,9 +379,11 @@ def local_0_dot_x(node):
             return [T.alloc(constant_zero, y.shape[1])]
         elif x.ndim == 2 and y.ndim == 1:
             constant_zero = assert_(constant_zero,
-                                    T.eq(x.shape[1], y.shape[1]))
+                                    T.eq(x.shape[1], y.shape[0]))
             return [T.alloc(constant_zero, x.shape[0])]
         elif x.ndim == 1 and y.ndim == 1:
+            constant_zero = assert_(constant_zero,
+                                    T.eq(x.shape[0], y.shape[0]))
             return [constant_zero]
         else:
             _logger.warning("Optimization Warning: "