From bab7a32eeca3daa1d72fce6e97b4b45d5f0c9801 Mon Sep 17 00:00:00 2001
From: goldsimon <goldsimon@gmx.de>
Date: Tue, 13 Jun 2017 22:00:48 +0200
Subject: [PATCH] Remove smtp_server when passing NULL to
 smtp_set_server_addr() (see patch #9373 for discussion)

---
 src/apps/smtp/smtp.c | 6 +++++-
 1 file changed, 5 insertions(+), 1 deletion(-)

diff --git a/src/apps/smtp/smtp.c b/src/apps/smtp/smtp.c
index 219af2a0..483f6b57 100644
--- a/src/apps/smtp/smtp.c
+++ b/src/apps/smtp/smtp.c
@@ -351,7 +351,11 @@ smtp_set_server_addr(const char* server)
   if (len > SMTP_MAX_SERVERNAME_LEN) {
     return ERR_MEM;
   }
-  MEMCPY(smtp_server, server, len);
+  if (len != 0) {
+    MEMCPY(smtp_server, server, len);
+  } else {
+    smtp_server[0] = 0;
+  }
   return ERR_OK;
 }