Add conversion ctor from wxIcon to wxBitmapBundle too

Existing code may call functions taking wxBitmap with wxIcon, due to an
existing conversion from wxIcon to wxBitmap, so we need to provide a
similar conversion to wxBitmapBundle for compatibility.

src/common/bmpbndl.cpp

@@ -22,6 +22,7 @@
 #endif // WX_PRECOMP
 
 #include "wx/bmpbndl.h"
+#include "wx/icon.h"
 
 #include "wx/private/bmpbndl.h"
 
@@ -257,6 +258,11 @@ wxBitmapBundle::wxBitmapBundle(const wxBitmap& bitmap)
 {
 }
 
+wxBitmapBundle::wxBitmapBundle(const wxIcon& icon)
+    : m_impl(icon.IsOk() ? new wxBitmapBundleImplSet(wxBitmap(icon)) : NULL)
+{
+}
+
 wxBitmapBundle::wxBitmapBundle(const wxImage& image)
     : m_impl(image.IsOk() ? new wxBitmapBundleImplSet(wxBitmap(image)) : NULL)
 {