From 17546f53ac1377b0d4f45a800aaec7366ba5b6a0 Mon Sep 17 00:00:00 2001
From: Nikias Bassen
Date: Mon, 20 May 2019 01:24:15 +0200
Subject: plist_set_key_val(): prevent setting a key value that already exists
 in a PLIST_DICT

---
 src/plist.c | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/src/plist.c b/src/plist.c
index 29dbfb7..6d7a07f 100644
--- a/src/plist.c
+++ b/src/plist.c
@@ -1067,6 +1067,11 @@ static void plist_set_element_val(plist_t node, plist_type type, const void *val
 
 PLIST_API void plist_set_key_val(plist_t node, const char *val)
 {
+    plist_t father = plist_get_parent(node);
+    plist_t item = plist_dict_get_item(father, val);
+    if (item) {
+        return;
+    }
     plist_set_element_val(node, PLIST_KEY, val, strlen(val));
 }
 
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