[LyX/master] GuiIdListModel: ignore DecorationRole (icons of available list)

[Juergen Spitzmueller]

commit e325c7cc6ab25fc7e0223b64019649fda8ef5ff8
Author: Juergen Spitzmueller <sp...@lyx.org>
Date:   Sat Apr 20 17:50:21 2019 +0200

    GuiIdListModel: ignore DecorationRole (icons of available list)
---
 src/frontends/qt4/GuiIdListModel.cpp |    3 +++
 1 files changed, 3 insertions(+), 0 deletions(-)

diff --git a/src/frontends/qt4/GuiIdListModel.cpp 
b/src/frontends/qt4/GuiIdListModel.cpp
index 5780cec..b1db347 100644
--- a/src/frontends/qt4/GuiIdListModel.cpp
+++ b/src/frontends/qt4/GuiIdListModel.cpp
@@ -63,6 +63,9 @@ bool GuiIdListModel::setData(QModelIndex const & index,
                dataChanged(index, index);
                return true;
        }
+       if (role == Qt::DecorationRole)
+               // nothing to do
+               return true;
        // If we assert here, it's because we're trying to set an
        // unrecognized role.
        LATTEST(false);