[PATCH] src/modem.c/call_watches null pointer check

[Giacinto Cifelli <gciofono@gmail.com>]

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check the pointer modem->atom_watches, that can be null when the
function is called during the disable/remove of the device,
for example when it is unplugged or switched off.
---
 src/modem.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/src/modem.c b/src/modem.c
index 9e254482..124a5192 100644
--- a/src/modem.c
+++ b/src/modem.c
@@ -255,11 +255,16 @@ static void call_watches(struct ofono_atom *atom,
 				enum ofono_atom_watch_condition cond)
 {
 	struct ofono_modem *modem = atom->modem;
-	GSList *atom_watches = modem->atom_watches->items;
+	GSList *atom_watches;
 	GSList *l;
 	struct atom_watch *watch;
 	ofono_atom_watch_func notify;
 
+	if (!modem->atom_watches)
+		return;
+
+	atom_watches = modem->atom_watches->items;
+
 	for (l = atom_watches; l; l = l->next) {
 		watch = l->data;
 
-- 
2.17.1