[libsecret] egg: Fix null termination behavior of egg_secure_strndup()

[Daiki Ueno <dueno src gnome org>]

commit ea62c2dcda82d6f84cfd99c155bea9a2b1040ea0
Author: Daiki Ueno <dueno src gnome org>
Date:   Thu Mar 29 11:30:55 2018 +0200

    egg: Fix null termination behavior of egg_secure_strndup()
    
    Even if the given string is shorter than n, the result should be null
    terminated.  This matches the behavior of strndup().

 egg/egg-secure-memory.c |    1 +
 1 files changed, 1 insertions(+), 0 deletions(-)
---
diff --git a/egg/egg-secure-memory.c b/egg/egg-secure-memory.c
index 8d320f1..bc82184 100644
--- a/egg/egg-secure-memory.c
+++ b/egg/egg-secure-memory.c
@@ -1344,6 +1344,7 @@ egg_secure_strndup_full (const char *tag,
        len = length + 1;
        res = (char *)egg_secure_alloc_full (tag, len, options);
        memcpy (res, str, len);
+       res[length] = '\0';
        return res;
 }