[patch] Uninitialized Variable

[Elias Diem]

Hi

GCC warns that a variable might be uninitialized. See 
attached patch.

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Greetings
Elias


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diff --git a/src/json.c b/src/json.c
index 72b065f..f97d283 100644
--- a/src/json.c
+++ b/src/json.c
@@ -339,7 +339,7 @@ json_decode_object(js_read_T *reader, typval_T *res)
     typval_T   item;
     dictitem_T *di;
     char_u     buf[NUMBUFLEN];
-    char_u     *key;
+    char_u     *key = NULL;
     int                ret;
 
     if (res != NULL && rettv_dict_alloc(res) == FAIL)