tests CHANGE add unit tests for more yin parser element functions
diff --git a/src/parser_yin.c b/src/parser_yin.c
index 5e0a5cf..7ab51b6 100644
--- a/src/parser_yin.c
+++ b/src/parser_yin.c
@@ -931,9 +931,9 @@
 {
     LY_ERR ret = LY_SUCCESS;
     struct sized_string prefix, name;
-    char *out;
-    size_t out_len;
-    int dynamic;
+    char *out = NULL;
+    size_t out_len = 0;
+    int dynamic = 0;
     struct yin_arg_record *subelem_attrs = NULL;
     enum yang_keyword kw = YANG_NONE;
     struct yin_subelement *subelem_info_rec = NULL;