If we have multiple filters in a Save dialog, don't use

kNavPreserveSaveFileExtension since it suppresses multiple
filters.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@27616 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/filedlg.cpp

@@ -407,7 +407,8 @@ int wxFileDialog::ShowModal()
         dialogCreateOptions.optionFlags |= kNavDontAddTranslateItems;
 
         // The extension is important
-        dialogCreateOptions.optionFlags |= kNavPreserveSaveFileExtension;
+        if (numFilters < 2)
+            dialogCreateOptions.optionFlags |= kNavPreserveSaveFileExtension;
 
         err = ::NavCreatePutFileDialog(&dialogCreateOptions,
                                        // Suppresses the 'Default' (top) menu item