修复单图选择

@@ -119,6 +119,7 @@ class ImagePickerOhos extends ImagePickerPlatform {
       GeneralOptions(
       GeneralOptions(
         allowMultiple: false,
         allowMultiple: false,
         usePhotoPicker: useOhosPhotoPicker,
         usePhotoPicker: useOhosPhotoPicker,
+        limit: 1
       ),
       ),
     );
     );
     return paths.isEmpty ? null : paths.first;
     return paths.isEmpty ? null : paths.first;