Fix crash when dragging and dropping the only DKDM.

diff --git a/src/tools/dcpomatic_kdm.cc b/src/tools/dcpomatic_kdm.cc
index 9995d80a9819111056549285610c7740d44df378..b82cec2ad56d6b19a7097ec81930583f473a6bcf 100644 (file)
--- a/src/tools/dcpomatic_kdm.cc
+++ b/src/tools/dcpomatic_kdm.cc
@@ -380,7 +380,7 @@ private:
        {
                DKDMMap::iterator from = _dkdm_id.find (_dkdm->GetSelection ());
                DKDMMap::iterator to = _dkdm_id.find (ev.GetItem ());
-               if (from == _dkdm_id.end() || to == _dkdm_id.end()) {
+               if (from == _dkdm_id.end() || to == _dkdm_id.end() || from->first == to->first) {
                        return;
                }