Fixed saving dialog's filter index always being -1 with wxOSX-Cocoa.

This problem was reproducable using the Save file dialog in the dialogs sample.
The member m_filterIndex was only initialised to -1 and never set at another point. Set it to the filter's selection during ModalFinishedCallback.

Closes #13158.



git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@67550 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/osx/cocoa/filedlg.mm

@@ -592,6 +592,10 @@ void wxFileDialog::ModalFinishedCallback(void* panel, int returnCode)
             m_path = wxCFStringRef::AsString([sPanel filename]);
             m_fileName = wxFileNameFromPath(m_path);
             m_dir = wxPathOnly( m_path );
+            if (m_filterChoice)
+            {
+                m_filterIndex = m_filterChoice->GetSelection();
+            }
         }
     }
     else