bugfix: TSG-14162 使用strlen(meta->route_ctx)判断route_ctx是否为空时，遗漏route_ctx首字节为0的情况

platform/include/sce.h

@@ -45,6 +45,9 @@ struct packet_info
 
     char *header_data;
     int header_len;
+
+    struct sids sids;
+    struct route_ctx route_ctx;
 };
 
 struct session_ctx
@@ -52,8 +55,8 @@ struct session_ctx
     struct fixed_num_array policy_ids;
     uint64_t session_id;
 
-    char raw_pkt_i2e_route_ctx[64];
-    char raw_pkt_e2i_route_ctx[64];
+    struct route_ctx raw_pkt_i2e_route_ctx;
+    struct route_ctx raw_pkt_e2i_route_ctx;
 
     struct sids raw_pkt_i2e_sids;
     struct sids raw_pkt_e2i_sids;