Clear PMKSA cache entry data when freeing them

Avoid leaving the PMK information unnecessarily in memory.

Signed-off-by: Jouni Malinen <j@w1.fi>

src/rsn_supp/pmksa_cache.c

@@ -35,7 +35,7 @@ static void pmksa_cache_set_expiration(struct rsn_pmksa_cache *pmksa);
 
 static void _pmksa_cache_free_entry(struct rsn_pmksa_cache_entry *entry)
 {
-	os_free(entry);
+	bin_clear_free(entry, sizeof(*entry));
 }