dict_attr_free should check pointer value

diff --git a/src/lib/dict.c b/src/lib/dict.c
index cc1c703..55adb76 100644 (file)
--- a/src/lib/dict.c
+++ b/src/lib/dict.c
@@ -2449,6 +2449,8 @@ void dict_attr_free(DICT_ATTR const **da)
 {
        DICT_ATTR **tmp;
        
+       if (!da || !*da) return;
+       
        /* Don't free real DAs */
        if (!(*da)->flags.is_unknown) {
                return;