Allow calling IO::silence for yet unregistered ports (Click)

[ardour.git] / libs / ardour / io.cc

diff --git a/libs/ardour/io.cc b/libs/ardour/io.cc
index 46c5d7b8c5f434a56a32603525ac56b59be78403..a3549f0a1d3ff0895ae7c9fb9abe99435b3e0093 100644 (file)
--- a/libs/ardour/io.cc
+++ b/libs/ardour/io.cc
@@ -148,7 +148,9 @@ IO::silence (framecnt_t nframes)
        /* io_lock, not taken: function must be called from Session::process() calltree */
 
        for (PortSet::iterator i = _ports.begin(); i != _ports.end(); ++i) {
-               i->get_buffer(nframes).silence (nframes);
+               if (i->port_handle ()) {
+                       i->get_buffer(nframes).silence (nframes);
+               }
        }
 }