Mackie Control: fix math error that tried to change bank to very high number

diff --git a/libs/surfaces/mackie/mackie_control_protocol.cc b/libs/surfaces/mackie/mackie_control_protocol.cc
index 97f96157d0b838dc3dbdfae46cd17b2a79ff4e33..2580fa9672c2ef0e098e3dea9581466956a59186 100644 (file)
--- a/libs/surfaces/mackie/mackie_control_protocol.cc
+++ b/libs/surfaces/mackie/mackie_control_protocol.cc
@@ -1301,7 +1301,11 @@ MackieControlProtocol::notify_remote_id_changed()
 
        if (sorted.size() - _current_initial_bank < sz) {
                // but don't shift backwards past the zeroth channel
-               switch_banks (max((Sorted::size_type) 0, sorted.size() - sz));
+               if (sorted.size() < sz) {  // avoid unsigned math mistake below
+                       switch_banks(0, true);
+               } else {
+                       switch_banks (max((Sorted::size_type) 0, sorted.size() - sz), true);
+               }
        } else {
                // Otherwise just refresh the current bank
                refresh_current_bank();