Comment 2 for bug 1421821

StacktraceTop:
 g_assertion_message (domain=domain@entry=0x0, file=file@entry=0x40cdf7 "nd-notification.c", line=line@entry=247, func=func@entry=0x40d060 <__FUNCTION__.49738> "hint_to_boolean", message=message@entry=0x24d1d80 "code should not be reached") at /build/buildd/glib2.0-2.43.3/./glib/gtestutils.c:2356
 g_assertion_message_expr (domain=domain@entry=0x0, file=file@entry=0x40cdf7 "nd-notification.c", line=line@entry=247, func=func@entry=0x40d060 <__FUNCTION__.49738> "hint_to_boolean", expr=expr@entry=0x0) at /build/buildd/glib2.0-2.43.3/./glib/gtestutils.c:2371
 hint_to_boolean (notification=<optimized out>, hint_name=hint_name@entry=0x40ce17 "action-icons") at nd-notification.c:247
 nd_notification_get_action_icons (notification=<optimized out>) at nd-notification.c:268
 add_notification_action (key=0x259c060 "media-skip-backward", text=0x258bd00 "Previous", bubble=0x2658660) at nd-bubble.c:886