String changes for translations,

Made wxBitmap derive from wxGDIObject,
  Removed #ifdefs around destrctors for GDI lists (wxBrushList etc),
  Created wxEVT_COMMAND_SPINCTRL_UPDATE with obvious usage.


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4813 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/common/imagpng.cpp

@@ -243,7 +243,8 @@ bool wxPNGHandler::LoadFile( wxImage *image, wxInputStream& stream, bool verbose
  error_nolines:
     lines = NULL; // called from before it was set
  error:
-    wxLogError(_("Couldn't load a PNG image - probably file is corrupted."));
+    if (verbose)
+       wxLogError(_("Couldn't load a PNG image - file is corrupted or not enough memory."));
 
     if ( image->Ok() )
     {