【文字图片编辑】获取字体颜色crash修复

PDF Office/PDF Master/Class/PDFWindowController/Side/RightSide/EditPDF/Manager/KMEditPDFTextManager.swift

@@ -400,7 +400,7 @@ extension KMEditPDFTextManager {
         resultModel.change = change
         resultModel.type = type
         if type == .customize {
-            resultModel.color = UserDefaults.standard.pdfListViewColor(forKey: FontColor_USERDEFAULTS)
+            resultModel.color = UserDefaults.standard.pdfListViewColor(forKey: FontColor_USERDEFAULTS) ?? NSColor.black
         }
         return resultModel
     }