1. wxFileDialog patch for multiple selection applied (with some small changes),

added demo for it in the sample and documented
2. wxMimeTypeManager works a bit better under Windows (doesn't ignore the
   extensions without filetypes)


git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/trunk@4850 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

samples/console/console.cpp

@@ -65,7 +65,12 @@ static void TestMimeEnum()
     {
         wxFileType *filetype = mimeTM.GetFileTypeFromMimeType(mimetypes[n]);
         if ( !filetype )
+        {
+            printf("nothing known about the filetype '%s'!\n", 
+                   mimetypes[n].c_str()); 
             continue;
+        }
+
         filetype->GetDescription(&desc);
         filetype->GetExtensions(exts);