Merge pull request #9765 from gebart/pr/sprintf-len

tests/gnrc_netif: Fix -Wformat-overflow

tests/gnrc_netif/main.c

@@ -1043,7 +1043,7 @@ static void test_netif_iter(void)
 
 static void test_netif_get_name(void)
 {
-    char exp_name[NETIF_NAMELENMAX];
+    char exp_name[NETIF_NAMELENMAX + 1];
     char name[NETIF_NAMELENMAX];
     int res;
     netif_t netif = netif_iter(NETIF_INVALID);