Fix zero flag construction

Author: dg0yt

src/club.cpp

@@ -333,7 +333,7 @@ QVariant ClubDB::headerData(int section, Qt::Orientation orientation, int role)
 Qt::ItemFlags ClubDB::flags(const QModelIndex& index) const
 {
 	if (!index.isValid())
-		return 0;
+		return {};
 
 	return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
 }

src/location.cpp

@@ -159,7 +159,7 @@ int LocationDB::columnCount(const QModelIndex& parent) const
 Qt::ItemFlags LocationDB::flags(const QModelIndex& index) const
 {
 	if (!index.isValid())
-		return 0;
+		return {};
 
 	return Qt::ItemIsEditable | Qt::ItemIsEnabled | Qt::ItemIsSelectable;
 }

src/resultList.cpp

@@ -644,7 +644,7 @@ QVariant ResultList::headerData(int section, Qt::Orientation orientation, int ro
 Qt::ItemFlags ResultList::flags(const QModelIndex& index) const
 {
 	if (!index.isValid())
-		return 0;
+		return {};
 
 	// TODO!
 	return /*Qt::ItemIsEditable |*/ Qt::ItemIsEnabled | Qt::ItemIsSelectable;
@@ -957,7 +957,7 @@ Qt::ItemFlags ResultsTree::GroupSortProxyModel::flags(const QModelIndex& index)
 	if (index.parent() == QModelIndex())
 	{
 		if (!index.isValid())
-			return 0;
+			return {};
 
 		return Qt::ItemIsEnabled | Qt::ItemIsSelectable;
 	}

src/runner.cpp

@@ -521,7 +521,7 @@ QVariant RunnerDB::headerData(int section, Qt::Orientation orientation, int role
 Qt::ItemFlags RunnerDB::flags(const QModelIndex& index) const
 {
 	if (!index.isValid())
-		return 0;
+		return {};
 
 	if (index.column() == 4)	// clubs
 		return Qt::ItemIsEnabled | Qt::ItemIsSelectable;