Do not unref a NULL pointer.

diff --git a/server/mm_sound_mgr_pulse.c b/server/mm_sound_mgr_pulse.c
index 158f1d8..cb8c19a 100644 (file)
--- a/server/mm_sound_mgr_pulse.c
+++ b/server/mm_sound_mgr_pulse.c
@@ -336,9 +336,13 @@ static void sink_info_cb (pa_context *c, const pa_sink_info *i, int is_last, voi
 
 static void pulse_set_default_sink (pulse_info_t * pinfo, char *device_api_name, char *device_bus_name)
 {
+    pa_operation *op;
        strcpy (pinfo->device_api_name, device_api_name);
        strcpy (pinfo->device_bus_name, device_bus_name);
-       pa_operation_unref(pa_context_get_sink_info_list(pinfo->context, sink_info_cb, pinfo));
+
+    op = pa_context_get_sink_info_list(pinfo->context, sink_info_cb, pinfo);
+    if (op)
+        pa_operation_unref(op);
 }
 
 static int pulse_deinit (pulse_info_t * pinfo)