wxCocoa: Better icon support

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@25400 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

include/wx/cocoa/bitmap.h

@@ -86,6 +86,9 @@ public:
     // Convert from wxImage:
     wxBitmap(const wxImage& image, int depth = -1)
     {   CreateFromImage(image, depth); }
+    // Convert from wxIcon
+    wxBitmap(const wxIcon& icon) { CopyFromIcon(icon); }
+
     // destructor
     ~wxBitmap();