source: Fixed bug: pa_source_set_port() did not update the latency_offset.

Unlike pa_sink_set_port(), which calls pa_sink_set_latency_offset() to update
the latency offset of the sink to match that of its newly set port,
pa_source_set_port() did not do so. This patch adds the appropriate call to
pa_source_set_latency_offset() in pa_source_set_port() to fix this.

src/pulsecore/source.c

@@ -2637,6 +2637,8 @@ int pa_source_set_port(pa_source *s, const char *name, bool save) {
     s->active_port = port;
     s->save_port = save;
 
+    pa_source_set_latency_offset(s, s->active_port->latency_offset);
+
     pa_hook_fire(&s->core->hooks[PA_CORE_HOOK_SOURCE_PORT_CHANGED], s);
 
     return 0;