Merge branch 'develop_PDFReaderProNew' of git.kdan.cc:Mac_PDF/PDF_Office into develop_PDFReaderProNew

PDF Office/PDF Master/Class/PDFTools/Merge/MergeNew/KMMergeWindowController.swift

@@ -259,7 +259,7 @@ extension KMMergeWindowController {
                     savePanel.accessoryView = savePanelAccessoryViewController.view
     //                self.savePanelAccessoryViewController = savePanelAccessoryViewController;
                     savePanel.beginSheetModal(for: self.window!) { result in
-                        if result != nil {
+                        if result == .OK {
                             var outputSavePanel = savePanel.url?.path
                             DispatchQueue.main.async {
                                 var success = self.oldPDFDocument.write(toFile: outputSavePanel!)