Applied patch to add n bitmaps at once to an image

list of the bitmap is n times as wide as the
    image width of the image list. This was the case
    in the MSW image list before.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@38965 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/mac/carbon/imaglist.h

@@ -70,6 +70,7 @@ public:
     wxIcon GetIcon(int index) const;
     bool Replace( int index, const wxIcon &bitmap );
     bool Replace( int index, const wxBitmap &bitmap );
+    bool Replace( int index, const wxBitmap &bitmap, const wxBitmap &mask );
     bool Remove( int index );
     bool RemoveAll();