fix invalid mapping detection

diff --git a/libs/ardour/plugin_insert.cc b/libs/ardour/plugin_insert.cc
index b02437e130346daaaed73321510b033227b387f6..99893ca0220e6a3b1d8fb77646b050a50c6216bc 100644 (file)
--- a/libs/ardour/plugin_insert.cc
+++ b/libs/ardour/plugin_insert.cc
@@ -959,14 +959,14 @@ PluginInsert::sanitize_maps ()
                        for (uint32_t i = 0; i < natural_input_streams().get (*t); ++i) {
                                bool valid;
                                uint32_t idx = _in_map[pc].get (*t, i, &valid);
-                               if (valid && idx <= _configured_in.get (*t)) {
+                               if (valid && idx < _configured_in.get (*t)) {
                                        new_in.set (*t, i, idx);
                                }
                        }
                        for (uint32_t o = 0; o < natural_output_streams().get (*t); ++o) {
                                bool valid;
                                uint32_t idx = _out_map[pc].get (*t, o, &valid);
-                               if (valid && idx <= _configured_out.get (*t)) {
+                               if (valid && idx < _configured_out.get (*t)) {
                                        new_out.set (*t, o, idx);
                                }
                        }
@@ -1034,6 +1034,7 @@ PluginInsert::reset_map (bool emit)
                        _out_map[pc].offset_to(*t, pc * natural_output_streams().get(*t));
                }
        }
+       sanitize_maps ();
        if (old_in == _in_map && old_out == _out_map) {
                return false;
        }