UI: Set remux entry state before adding to queue

When adding to the queue, this triggers rowCountChanged which then
calls canClearFinished, reading undefined memory for state if this is
not set. The correct state is set immediately after by checkInputPath.

Detected by UBSan.

UI/window-remux.cpp

@@ -367,6 +367,7 @@ bool RemuxQueueModel::setData(const QModelIndex &index, const QVariant &value,
 				for (QString path : pathList) {
 					RemuxQueueEntry entry;
 					entry.sourcePath = path;
+					entry.state = RemuxEntryState::Empty;
 
 					queue.insert(row, entry);
 					row++;
@@ -386,6 +387,7 @@ bool RemuxQueueModel::setData(const QModelIndex &index, const QVariant &value,
 		if (!path.isEmpty()) {
 			RemuxQueueEntry entry;
 			entry.sourcePath = path;
+			entry.state = RemuxEntryState::Empty;
 
 			beginInsertRows(QModelIndex(), queue.length() + 1,
 					queue.length() + 1);