made wxImage::Scale() const to not confuse people any more and added

a Rescale() which changes the image size "in place". Documented both
changes too.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@2955 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/image.cpp

@@ -150,7 +150,7 @@ void wxImage::Destroy()
     UnRef();
 }
 
-wxImage wxImage::Scale( int width, int height )
+wxImage wxImage::Scale( int width, int height ) const
 {
     wxImage image;