Fix attachment filename handling

Currently filenames containing '#' are not correctly escaped, which
prevents to open attachments. This resolves issue #119.

Signed-off-by: pschwabauer <pschwabauer@intevation.de>
(cherry picked from commit 8c541bef93)

kmail/kmreaderwin.cpp

@@ -2690,7 +2690,7 @@ KURL KMReaderWin::tempFileUrlFromPartNode( const partNode * node )
       bool ok;
       int res = path.mid(left + 1, right - left - 1).toInt(&ok);
       if ( res == node->nodeId() )
-          return KURL( path );
+          return KURL::fromPathOrURL( path );
   }
   return KURL();
 }