[PATCH 1/2] gatppp: Check ppp instance before unref it

[Zhenhua Zhang]

---
 gatchat/gatppp.c |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/gatchat/gatppp.c b/gatchat/gatppp.c
index 1d41ded..d9b1627 100644
--- a/gatchat/gatppp.c
+++ b/gatchat/gatppp.c
@@ -446,6 +446,9 @@ void g_at_ppp_unref(GAtPPP *ppp)
 {
 	gboolean is_zero;
 
+	if (ppp == NULL)
+		return;
+
 	is_zero = g_atomic_int_dec_and_test(&ppp->ref_count);
 
 	if (is_zero == FALSE)
-- 
1.6.3.3