!1029 lstm operators dims check

Merge pull request !1029 from chenweifeng/lstm_ops_check

mindspore/ops/operations/nn_ops.py

@@ -2159,8 +2159,9 @@ class LSTM(PrimitiveWithInfer):
             self.num_directions = 1
 
     def infer_shape(self, x_shape, h_shape, c_shape, w_shape):
-        # (batch, seq, feature)
+        # (seq, batch_size, feature)
         validator.check_integer("x rank", len(x_shape), 3, Rel.EQ, self.name)
+        validator.check_integer("x[2]", x_shape[2], self.input_size, Rel.EQ, self.name)
 
         # h and c should be same shape
         validator.check_integer("h rank", len(h_shape), 3, Rel.EQ, self.name)