GB28181: ps解析失败触发断言时，丢弃所有数据

src/Rtp/PSDecoder.cpp

@@ -71,7 +71,8 @@ const char *PSDecoder::onSearchPacketTail(const char *data, size_t len) {
         InfoL << "解析 ps 异常: bytes=" << len
               << ", exception=" << ex.what()
               << ", hex=" << hexdump(data, MIN(len, 32));
-        return nullptr;
+        //触发断言，解析失败，丢弃所有数据
+        return data + len;
     }
 }