Fix error when create new OpenCS addon

components/contentselector/model/contentmodel.cpp

@@ -474,10 +474,14 @@ void ContentSelectorModel::ContentModel::addFiles(const QString &path)
 
 void ContentSelectorModel::ContentModel::clearFiles()
 {
-    beginRemoveRows(QModelIndex(), 0, mFiles.count()-1);
+    const int filesCount = mFiles.count();
+
+    if (filesCount > 0) {
+        beginRemoveRows(QModelIndex(), 0, filesCount - 1);
         mFiles.clear();
         endRemoveRows();
     }
+}
 
 QStringList ContentSelectorModel::ContentModel::gameFiles() const
 {