trying fix deconv bias tensor bug (#457)

* fix deconv ref bias_tensor bug

src/dev/cpu/op/deconv/deconv_ref.c

@@ -282,14 +282,16 @@ static int run(struct node_ops* node_ops, struct exec_node* exec_node, struct ex
     struct ir_graph* ir_graph = ir_node->graph;
     struct ir_tensor* i_tensor = get_ir_graph_tensor(ir_graph, ir_node->input_tensors[0]);
     struct ir_tensor* weight_tensor = get_ir_graph_tensor(ir_graph, ir_node->input_tensors[1]);
-    struct ir_tensor* bias_tensor = get_ir_graph_tensor(ir_graph, ir_node->input_tensors[2]);
+    struct ir_tensor* bias_tensor = NULL;
     struct ir_tensor* output_tensor = get_ir_graph_tensor(ir_graph, ir_node->output_tensors[0]);
-
     void* output_data = output_tensor->data;
     const void* input_data = i_tensor->data;
     const void* kernel = weight_tensor->data;
-
     const void* bias = NULL;
+    if (ir_node->input_num > 2)
+    {
+        bias_tensor = get_ir_graph_tensor(ir_graph, ir_node->input_tensors[2]);
+    }
     if (bias_tensor != NULL)
         bias = bias_tensor->data;