cleanup: return directly in ExtraDataModel::data()

Instead of assigning to a ret variable and returning at the
end of the function, return directly from the various switch
branches. This is more idiomatic and consistent with the other
models.

Signed-off-by: Berthold Stoeger <bstoeger@mail.tuwien.ac.at>

qt-models/divecomputerextradatamodel.cpp

@@ -20,33 +20,28 @@ void ExtraDataModel::clear()
 
 QVariant ExtraDataModel::data(const QModelIndex &index, int role) const
 {
-	QVariant ret;
 	struct extra_data *ed = get_dive_dc(&displayed_dive, dc_number)->extra_data;
 	int i = -1;
 	while (ed && ++i < index.row())
 		ed = ed->next;
 	if (!ed)
-		return ret;
+		return QVariant();
 
 	switch (role) {
 	case Qt::FontRole:
-		ret = defaultModelFont();
+		return defaultModelFont();
-		break;
 	case Qt::TextAlignmentRole:
-		ret = int(Qt::AlignLeft | Qt::AlignVCenter);
+		return static_cast<int>(Qt::AlignLeft | Qt::AlignVCenter);
-		break;
 	case Qt::DisplayRole:
 		switch (index.column()) {
 		case KEY:
-			ret = QString(ed->key);
+			return ed->key;
-			break;
 		case VALUE:
-			ret = QString(ed->value);
+			return ed->value;
-			break;
 		}
-		break;
+		return QVariant();
 	}
-	return ret;
+	return QVariant();
 }
 
 int ExtraDataModel::rowCount(const QModelIndex&) const