From b47dc3f77c12b7bcaf2e42159c04dd56ebb0a682 Mon Sep 17 00:00:00 2001
From: Matias Fontanini <matias.fontanini@gmail.com>
Date: Wed, 10 May 2017 19:13:45 -0700
Subject: [PATCH] Only call memcpy in PDUOption if size > 0

---
 include/tins/pdu_option.h | 4 +++-
 1 file changed, 3 insertions(+), 1 deletion(-)

diff --git a/include/tins/pdu_option.h b/include/tins/pdu_option.h
index 6e950c9..0f435c1 100644
--- a/include/tins/pdu_option.h
+++ b/include/tins/pdu_option.h
@@ -515,7 +515,9 @@ private:
         }
         real_size_ = static_cast<uint16_t>(total_size);
         if (real_size_ <= small_buffer_size) {
-            std::memcpy(payload_.small_buffer, &*start, total_size);
+            if (total_size > 0) {
+                std::memcpy(payload_.small_buffer, &*start, total_size);
+            }
         }
         else {
             payload_.big_buffer_ptr = new data_type[real_size_];