json_tokener_parse(): avoid possible NULL deref
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@@ -113,6 +113,8 @@ struct json_object* json_tokener_parse(const char *str)
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struct json_object* obj;
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tok = json_tokener_new();
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if (!tok)
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return NULL;
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obj = json_tokener_parse_ex(tok, str, -1);
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if(tok->err != json_tokener_success)
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obj = NULL;
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