Fix pasting UTF8 text from clipboard.

This commit is based on work from Roman Savochenko <roman@home.home> available at PR #13, but adapted to the TDE standard. It replaces the aforementioned PR #13.

Signed-off-by: Michele Calgaro <michele.calgaro@yahoo.it>
(cherry picked from commit 50860c0fde)

src/diff.cpp

@@ -241,7 +241,8 @@ void SourceData::setData( const TQString& data )
    }
 
    FileAccess f( m_tempInputFileName );
-   bool bSuccess = f.writeFile( TQTextCodec::codecForName("UTF-8")->fromUnicode(data), data.length() );
+   TQCString cData = TQTextCodec::codecForName("UTF-8")->fromUnicode(data);
+   bool bSuccess = f.writeFile( cData, cData.length() );
    if ( !bSuccess )
    {
       KMessageBox::error( m_pOptionDialog, i18n("Writing clipboard data to temp file failed.") );